| Subject | Date Asked |
|
| Enzyme Catalysis | 11/15/2009 |
Q: How does the structure of an enzyme relate to its function and what factors can affect the initial ...
A: Enzymes function as biological catalysts, meaning that they increase the rate of biological ...
|
| Circulatory route take by RBC from site of production. | 11/14/2009 |
Q: Describe the circulatory route taken by a red blood cell from its site of production, in some part ...
A: Red blood cells (RBCs) begin life in the bone marrow--mostly in the ribs, vertebrae, and pelvis in ...
|
| Biology | 11/12/2009 |
Q: Does Euglena have Mitochondria? I know most of them have Chloroplasts, and that supplies the the ...
A: Euglena does indeed have mitochondria, as do all eukaryotic organisms. Mitochondria serve the same ...
|
| pregnancy | 11/10/2009 |
Q: my period started today so which day will i ovulate?
A: The menstrual cycle lasts around 28 days in most cases, with a variation of about one week. Within ...
|
| mitosis | 11/9/2009 |
Q: In mitosis, how many chromosomes do you have when you have finished replicating all of the DNA? In ...
A: Understanding the terminology related to mitosis/meiosis can be confusing and difficult, but a solid ...
|
| help...reallly important | 11/5/2009 |
Q: Cumulative Oxygen Consumed (mL) ______________________________________________ Time ...
A: I'm not entirely sure what you're asking here, but I'll tell you what I think. If you need to plot ...
|
| Define 'Preformed' Organic Molecules as Applies to Heterotrophs | 11/4/2009 |
Q: Can you please define 'preformed,'as applies to heterotrophs...obviously we can't convert sunlight ...
A: Your interpretation is correct: heterotrophs are defined by their consumption of complex organic ...
|
| Urine | 11/3/2009 |
Q: How is the urine of someone with damage to their cells in the glomerulus and glomerular capsule ...
A: The function of the glomerular cells is to provide a first-pass filter for the blood plasma as it ...
|
| Circulation | 10/31/2009 |
Q: First let me say I am grateful to have found this website and appreciate your expertise and ...
A: Your question is a fundamental one about the anatomy and physiology of the heart, and it's important ...
|
| Biology | 10/21/2009 |
Q: I chose a science fair question, which is How does body position affect the autonomic regulation of ...
A: 1. I'm afraid the question is a little complex, so I'll have to answer it at length. First, height ...
|
| bio | 10/20/2009 |
Q: Can all molecules diffuse through all cell membranes?
A: The answer is no--the ability of a molecule to diffuse through a cell membrane (or any membrane) ...
|
| biology | 10/19/2009 |
Q: is photosynthesis an endergonic or exergonic reaction
A: Photosynthesis is a net endergonic reaction; energy must be put into the reaction to drive it to ...
|
| i need help? | 10/16/2009 |
Q: 1. The phospholipid molecules of most membranes have a : A - hydrophobic head and a hydrophilic ...
A: Sorry for the long delay in answering your question. The answers are given as follows, along with a ...
|
| endocrine system | 9/7/2009 |
Q: I've done 14 short answer questions on the Endocrine system but this one question stumps me I think ...
A: Your question is extremely general, and I don't want to produce an overly-long answer, but here are ...
|
| biology homework question! | 9/2/2009 |
Q: Okay, i was doing my biology homework when i came across the question, How does an organisms growth ...
A: and I apologize for the delay in replying to you. Organisms display a number of characteristics ...
|
| fungi as producers | 8/12/2009 |
Q: Since Fungi digest the substrate around them why are they not considered consumers instead of ...
A: All consumers require preformed organic molecules to use for an energy source, and this includes ...
|
| Freckles | 8/10/2009 |
Q: I have a quick question about freckles. Is it possible for one fraternal twin to have her freckles ...
A: Yes, it would not be unexpected for identical twins to develop different freckle patterns, for the ...
|
| Freckles | 8/9/2009 |
Q: I have a quick question about freckles. Is it possible for one fraternal twin to have her freckles ...
A: The answer is undoubtedly yes. As you may be aware, fraternal twins are produced by two separate ...
|
| Evolution | 8/7/2009 |
Q: Is it any powerful/good evidence for evolution?
A: There is ONLY powerful evidence for evolution, in the sense that no other theory or explanation so ...
|
| puberty | 8/6/2009 |
Q: I have been told puberty ends at 16 but other people have said it ends at 18. I began puberty when i ...
A: There is no set age at which puberty completes; it depends both on when it begins (since a later ...
|
| genetics | 8/5/2009 |
Q: what is the role of non template strand in transcription?does it helps RNA polymerase in reading?
A: The nontemplate strand, of course, is not transcribed during transcription and has no role in the ...
|
| Gene technology | 7/27/2009 |
Q: Explain how cystic fibrosis is inherited. Thanks
A: Cystic fibrosis (CF) is a hereditary disease characterized by dysfunctions of the secretory glands, ...
|
| Nerve Response to Stimuli | 7/23/2009 |
Q: We are going over how nerve cells receive and transmit signals and the subject was brought up of why ...
A: There are various questions within your larger question, and I will try to address the major one ...
|
| biology | 7/7/2009 |
Q: i cant differentiate that much about chromosomes, chromatid, chromatin and homologous chromosome. my ...
A: The exact differences between chromosomes, chromatids, chromatin, and homologous chromosomes can be ...
|
| I need help answering questions | 7/2/2009 |
Q: What is absent from a bacterial cell? Why are gases hotter than liquids or solids?
A: These questions are fairly vague and broad, but I can help direct as to their answers. Bacteria lack ...
|
| Biology | 7/1/2009 |
Q: Why were humans unaware of microrganisms for most of thier history?
A: The most likely reason for this lack of awareness was a lack of sufficiently complex scientific ...
|
| Fruit experiment | 6/23/2009 |
Q: We have been doing an experiment on preserving apples. We put a half an apple in lemon juice, water ...
A: I can answer some of your questions broadly, but I unfortunately cannot determine the exact reason ...
|
| Biology | 6/21/2009 |
Q: Eukaryotic cells can divide by mitosis or meiosis. In humans, mitosis produces new cells for growth ...
A: The topic of genetic variability in sexually reproducing organisms is a fairly complex one, more so ...
|
| Ants and Microwaves | 6/20/2009 |
Q: Being somewhat in a hurry the other day, I popped a burrito in a microwave in which about a dozen ...
A: Microwaves work by exciting dielectric (insulating or nonconductive) substances within food like ...
|
| hai | 6/19/2009 |
Q: What 'M' is the mainly found in the body paet of the sperm?
A: I suspect the "M" you're describing is mitochondria, which are present in high concentrations within ...
|
| photosynthesis | 6/14/2009 |
Q: What is the source of oxygen atoms in glucose formed by photosynthesis? Also the source of hydrogen ...
A: In photosynthesis, glucose is formed by the interaction of sunlight (an energy source), carbon ...
|
| Bones | 6/12/2009 |
Q: 1. What is the bump a person gets on their head or hand when their bone hits something hard? 2. Is ...
A: I think that the bumps you are referring to may be from hematomas, which are masses of red blood ...
|
| Citric Acid Cycle | 6/11/2009 |
Q: I am a 2nd year student at university and studying for a Biochemistry exam. I was curious to know ...
A: The citric acid cycle--also known as the Krebs cycle or tricarboxylic acid cycle--does involve the ...
|
| biology | 6/6/2009 |
Q: If dialysis bag filled with water is placed in a molasses solution,what will happen to the weight of ...
A: Since the bag is semipermeable--that is a characteristic of dialysis membranes--there can be a ...
|
| cro magnon | 5/26/2009 |
Q: how do cro magnons communicate
A: Well, Cro-Magnons don't communicate at all anymore--have you seen any Cro-Magnons dining out ...
|
| dog urine, adult pnumonia | 5/9/2009 |
Q: I saw you answered a question about strong dog urine odors and issues RE: a baby in the house. What ...
A: As I indicated in my earlier answer, urine is a strongly favorable medium for bacterial growth once ...
|
| hagfish | 5/8/2009 |
Q: what is the body symmetry of a hagfish?
A: The hagfish has bilateral body symmetry; this fact is well-established, but there are lots of other ...
|
| Help.... | 5/6/2009 |
Q: A mechanical ventilator breathes for a paralyzed person. During inhalation the machine forces air ...
A: Mechanical ventilation simulates, but cannot replace, normal ventilation by the lungs; there are a ...
|
| height shrinkage | 5/4/2009 |
Q: Hey, I'm 19 yrs old & around my birthday when which was a little bit over 3 months ago I had a ...
A: So far as I am aware, there is no reason for height shrinkage following a shoulder injury, nor is ...
|
| Reproduction | 5/2/2009 |
Q: Can any or all mammals have multiple concurrent births from different sperm donors?
A: In certain, specific circumstances, it would be possible for different males to inseminate a single ...
|
| BLOOD TEST 4 FATHER OF CHILD | 4/27/2009 |
Q: HOW SO CAN A BLOOD TEST BE DONE TO DETERMINE THE FATHER OF A CHILD. HOW IS IT DONE?
A: Determining paternity with a blood test is done by techniques that examine the similarity between ...
|
| oblique plane | 4/25/2009 |
Q: I am studying Exercise Science and I would like to know if you could please describe a movement in ...
A: Throughout the field of anatomy, "oblique" refers to diagonal or slanted direction relative to the ...
|
| Anatomy and Physiology I | 4/22/2009 |
Q: i am doing a study guide for my Anatomy and Physiology class and could not find answers to these ...
A: 1. You were right with your initial thought: the listed cells all comprise neuroglia, the supporting ...
|
| dog urine | 3/28/2009 |
Q: My X boyfriend has a dog that is not potty trained and mostly uses the restroom inside anywhere he ...
A: It seems entirely possible that the explanation you've offered is the reason why you got sick when ...
|
| Glycolysis | 3/27/2009 |
Q: Is glycolysis an ancient method for extract energy from molecules?
A: I'm not sure what it means for glycolysis to be an "ancient" method for extracting energy from ...
|
| Human Impact on a grassland biome. | 3/24/2009 |
Q: the grassland. I've been told to find an expert who can answer the essential questions so I can put ...
A: but I am afraid that I do not have the requisite expertise to answer your question. My background ...
|
| biology | 3/19/2009 |
Q: Taking in nutrients through the small intestine is xalled what?
A: The process I believe that you are referring to is absorption, which occurs across the epithelial ...
|
| killing bacteria | 3/9/2009 |
Q: My son would like to grow bacteria in a petri dish and then use a variety of substances that are ...
A: The general reason that Petri dishes are not supposed to be opened right after swabbing is to avoid ...
|
| Honors Biology | 3/8/2009 |
Q: I am completely stumped on this question. After researching each of the choices, It seems to me ...
A: After considering the choices and doing some research of my own, I am unconvinced that any of these ...
|
| Life Chemistry and the Life of cells | 3/6/2009 |
Q: Im Dislexic abd Im home schooled and Im terrible with science. This is one of my test. Could you ...
A: I prefer not to simply answer homework questions directly, so here's what I'll do: I will tell you ...
|
| Music Vs Heartbeat | 2/18/2009 |
Q: Locke, I have read an article on the newspaper and it says that music would affect a person's ...
A: Your question actually gets to the heart of a fairly complex interaction between the environment and ...
|
| Acids and sugars | 2/10/2009 |
Q: I have been puzzling recently about what biologist/chemists mean at its most basic level when they ...
A: Humans use twenty amino acids to form all of their proteins. Of these, the body can synthesize ten ...
|
| Acids and sugars | 2/7/2009 |
Q: I have been puzzling recently about what biologist/chemists mean at its most basic level when they ...
A: Let's discuss acids first, as they are the simplest to describe. Acid means the same thing in this ...
|
| Biology | 2/4/2009 |
Q: Just starting a bio-chemistry class. Teacher asked the class to try to locate a comprehensive list ...
A: The most comprehensive list I can suggest would be found in a combination of mammalian and plant ...
|
| Organisms | 1/29/2009 |
Q: Why is there a limit to how big organisms can be? In what way does this limit hold true for all ...
A: The size of organisms is limited by a variety of physical factors that govern normal physiological ...
|
| hydrogen bonds | 1/28/2009 |
Q: Why are hydrogen bonds relatively weak bonds?
A: Hydrogen bonds are relatively weak due to their electrical characteristics. In hydrogen bonds ...
|
| biology | 1/27/2009 |
Q: what is osmoregulation?
A: Osmoregulation is the mechanism by which organisms control the balance of water and solute (salt) ...
|
| digestive system | 1/13/2009 |
Q: Does the digestive system help glucose enter all body cells.
A: In the broadest sense the answer to your question is yes, because the digestive system breaks down ...
|
| El Alto, Bolivia | 1/11/2009 |
Q: In what way are the inhabitants of El Alto, Bolivia different from other people? Thanks
A: I suspect that this question is asking about the adaptation to high-altitude living (El Alto is at ...
|
| biology | 1/7/2009 |
Q: How is energy stored and released in ATP?
A: ATP consists of adenosine, which is the junction of a double ring of carbon and nitrogen (adenine) ...
|
| removal of the hypothalamus | 1/6/2009 |
Q: If a boy's hypothalamus was removed, how will his puberty be different from other boys? and... how ...
A: Removal of the hypothalamus would eliminate the production of gonadotrophin releasing hormone ...
|
| Vestigial? | 1/3/2009 |
Q: What makes each of these; the appndix, coccyx, muscles that move ears, muscles that make hair, ...
A: Vestigial structures are those that have lost their primary or main function through the ...
|
| life span of the human cells | 1/1/2009 |
Q: I realize, being in the medical field, that the life span of all the cells that exist in humans are ...
A: First, it's important to realize that any description that you find of average cell lifespan makes ...
|
| bio | 12/8/2008 |
Q: Hemophilia, a disease the prevents blood clotting normally in humans, is controlled by a recessive ...
A: Hemophilia is an X-linked disease, meaning that the defective gene involved in the disease process ...
|
| spontaneous human combustion | 11/25/2008 |
Q: someone told me that humans can just be sitting around minding their own business when they can just ...
A: I'm not the first person to have addressed this question, so I will eventually direct you to some ...
|
| biology | 11/19/2008 |
Q: If you are using an up to date light microscope to examine animal cells, what won't you be able to ...
A: Structures invisible to normal light microscopy include organelles other than the nucleus, all ...
|
| What will my baby's hair and complexion look like | 11/16/2008 |
Q: I am wondering how my baby's hair will be. I have black straight hair and dark skin. Both my ...
A: The biology of skin, hair, and eye color is surprisingly complex, to the point that I am unable to ...
|
| C-shaped cartilage in the trachea | 11/9/2008 |
Q: could you please help me the followingWhat is the benefit of having C-shaped cartilage in the ...
A: Jazira. The c-shaped cartilage in the trachea serves several purposes. First, having cartilage at ...
|
| male reproductive system | 9/28/2008 |
Q: 1) What is inguinal canal? 2) my book says"Sometimes due to pressure in the ...
A: 1. The inguinal canal is an anatomical structure formed by the lower edges of the abdominal muscles ...
|
| experimental design | 9/13/2008 |
Q: Im not sure if you will be able to answer my question. although it is fairly general question. I am ...
A: The phrase "economical and feasible" will depend heavily upon the particular parameters surrounding ...
|
| Biology | 9/11/2008 |
Q: Why is skepitism considered a valuable quality in a scientist?
A: I could give you a simple definition of why scepticism is a valuable quality for a scientist, but ...
|
| Human Skin Shedding | 8/26/2008 |
Q: I live in a three story condo enclosed with 38 units. Some residents don't want to allow cats to ...
A: Your question is a relevant one, as many people have allergies to various substances in the ...
|
| Meiosis and Mitosis | 8/21/2008 |
Q: What types of cells are involved in each? and What is the genetic make up of the final product of ...
A: Evelyn. Mitosis and meiosis are both fairly complex processes, and explaining them in enough detail ...
|
| Metabolism | 8/3/2008 |
Q: I was just wondering why mice have such a high metabolism? I have a biology test tomorrow and I ...
A: This answer may have reached you after your exam, but I hope that you'd be interested in the result ...
|
| biology | 7/3/2008 |
Q: Are phagocytosis and pinocytosis also exocytosis, or what is considered exocytosis?
A: Greg. Pinocytosis and phagocytosis are forms of endocytosis: they are forms of cellular transport in ...
|
| Irises | 6/28/2008 |
Q: Nine months ago, I went started to suffer from depression and my diet became extremely poor; some ...
A: I am not familiar with an exact condition that matches your description, but there are numerous ...
|
| Biology | 6/25/2008 |
Q: my name is Mara and I am a tutor for a home-schooled 11 grader and came a cross a few questions I ...
A: Mara. I've responded to your questions below and have included some relevant links with them: 1. ...
|
| DANDELION SEASON LENGTH | 6/10/2008 |
Q: There are a lot of dandelions in our yard and neighborhood. All at once I seemed to notice a major ...
A: Rolland. Dandelion growth depends upon the ambient temperature, with cooler temperatures leading ...
|
| How will my baby look like? | 6/9/2008 |
Q: you r doing great job, Just wanted to know how will my baby look like i m three months pregnant,this ...
A: Lubna. We understand the genetics of eye color fairly well, to the point where websites have been ...
|
| photosynthesis | 6/3/2008 |
Q: I have a question about photosynthesis. I was wondering whether or not the type of light the plant ...
A: Marko. Let's take the easiest part of your question first: how the various plants appear to an ...
|
| instant death | 5/31/2008 |
Q: . My question regards instant death with decapitation. Does'nt the brain still have enough O2to ...
A: Donna. There is little consensus on the second part of your question, which has been addressed to ...
|
| Biology | 5/29/2008 |
Q: The right cerebrum controls the left part of the body and Vice versa why?
A: Nitesh. It is not exactly true that the left side of the brain controls the right side of the body ...
|
| osmosis and diffusion | 3/22/2008 |
Q: two cells are attached by a common membrane. in cell A, there is a sugar concentration of 0.5% and a ...
A: Brittany. We'll start with the fact that both water and solutes move in such a way so as to ...
|
| biology photosynthesis | 3/21/2008 |
Q: In photosynthesis what substances come in from the outside and what sunstances are produced?
A: Margie. Photosynthesis ultimately produces sugars (carbohydrates) that plants can use for energy; ...
|
| Multiple allels | 3/9/2008 |
Q: would you please explain to me the definition of multiple allels? aren't all allels multiple and do ...
A: David. "Multiple alleles" refers to a specific case in which there are three or more alleles for a ...
|
| Bacteria differences? | 3/8/2008 |
Q: What is the difference between chemoautotrophs and chemoheterotrophs and between photoautotrophs and ...
A: David. All organisms require energy and carbon from the environment to survive, bacteria included. ...
|
| viruses | 3/4/2008 |
Q: Hey, i would like to know the advantages and disadvatages of a virus to have either a RNA genome or ...
A: Pappu. There are two main points of comparison between RNA and DNA, as discussed below. RNA is less ...
|
| biology | 2/23/2008 |
Q: How might the result of a cardiovasualr exam differ for an athlete in top condition and a sedentary, ...
A: Nichole. There are a variety of beneficial cardiac adaptations that occur when people exercise ...
|
| Breakdown of glucose? | 2/22/2008 |
Q: I'm looking for a detailed answer for : What happens to glucose when it's brokendown, after the ...
A: Dara. The breakdown of glucose is fundamental to the survival of life; all organisms that use ...
|
| Biology on the human body | 2/21/2008 |
Q: I would like to know what forms on a human first the head or the anus. We were talking about it in ...
A: Becca. Humans, like all sexually reproducing animals, begin life as a single cell known as the ...
|
| Biology | 2/20/2008 |
Q: It will probably be an easy one for you. Monkeys, chimps, and gorillas don't come in packs, pods, ...
A: Dave. Collective nouns for animals are often confusing and unusual--I can't comment on the etymology ...
|
| physiology | 2/6/2008 |
Q: Which type of neural activity, action potentials, or synaptic potentials, produces the EEG?
A: Tim. The EEG monitors electrical activity as produced by post-synaptic potentials. Action potentials ...
|
| Dialysis Lab | 2/5/2008 |
Q: I've done 3 labs over the past week and I have some questions over the last one that I cannot figure ...
A: Holly. As to questions a and b, I'm not sure exactly what "changing the water bath" means. Does that ...
|
| late puberty | 2/3/2008 |
Q: my names austin, and i was wondering about going through puberty. I am 15 years old and a freshman ...
A: Austin. You may have heard or been told that not everyone experiences puberty at the same time, or ...
|
| algae enrgy source | 1/31/2008 |
Q: How does algae in the ocean get its energy source if there is no light ???
A: Becky. Algae are not universally photosynthetic; most can use the sun's energy to manufacture food, ...
|
| Biology | 1/28/2008 |
Q: (EFFECT OF TEMPERATURE ON THE RATE OF CATALASE REACTION) Hello, In my catalase practical i can't ...
A: Sameh. The optimal temperature for catalase activity varies between different species, demonstrating ...
|
| diffrence between bird flu and ordinary one | 1/20/2008 |
Q: we are agroup of teachers in the world -links organization in syria . We would like to ask you the ...
A: The bird flu is a particular strain of the flu (specifically, Influenza A subtype H5N1) that is ...
|
| cloning | 1/19/2008 |
Q: This is not a hw Q, simply I read this article on CNN.com= ...
A: Tim. Right now, it is not currently possible to clone a human being for practical and legal ...
|
| biology | 1/17/2008 |
Q: how many eyelids does camel have
A: Desmond. A camel has three eyelids: an upper and lower eyelid arranged the same way as in people ...
|
| biology | 1/15/2008 |
Q: Why is it that complex natural ecosystems are less vulnerable to harm from insects, pests, and plant ...
A: Monica. Your question touches on larger principles used in all sorts of designs, both in nature and ...
|
| ????? | 1/10/2008 |
Q: which phase of mitosis do these occur??....excretion of wastes, cell repair, and protein synthesis..
A: Bethany. You may wish to expand your question to which phases of the cycle include the above ...
|
| Evolution | 1/9/2008 |
Q: Did amoebas appear or first evolve before red algae and green algae?
A: Jasmine. So far as we know now, amoebas evolved before algae; protozoans (the group to which amoebas ...
|
| Antisceptic alcohol concentrations | 1/6/2008 |
Q: I work in a food safety lab and prepare many packaged products for analysis by spraying with an ...
A: You ask a good question, Richard, one that highlights the importance of attention to detail. Because ...
|
| longest survivng bacteria on surfaces | 1/4/2008 |
Q: I was just diagnosed with pink eye and have spent the entire day doing 10 loads of laundry with ...
A: Bacteria can survive very well or very poorly on particular surfaces, depending on the material, the ...
|
| Sex linked traits | 12/19/2007 |
Q: can you tell me how would i form a punnet square showing a disease with sex linked traits? Thank You
A: Byrd. The answer to this question requires a visual presentation, so I'm including links at the end ...
|
| viral dangers | 12/9/2007 |
Q: If someone carrying a virus(for example, Anthrax) died, and a carnivore were to eat the body, could ...
A: Alec. There's no simple answer to this question because not all viruses are alike. Let's start at ...
|
| dog urine | 12/8/2007 |
Q: My elderly parents with many health problems, are on oxygen, and very immobile due to lungm liver, ...
A: Brad. Before I start into the factual aspects of your question, let me just note that facts alone ...
|
| small intestine | 12/7/2007 |
Q: in biology class, we had a worksheet that said that we(humans) CAN NOT live without our small ...
A: Jake. You have an interesting idea here, but your instructor asks the right question in how you will ...
|
| wow....wat a question | 11/22/2007 |
Q: Mr.Locke,what are the advantages and disadvantages to having specialized cells?
A: David. Cell specialization is a prerequisite for complex life, so perhaps the biggest advantage of ...
|
| brain and consciousness | 10/29/2007 |
Q: do you know where consciousness arises in the animal kingdom following evolution? Why is it that ...
A: Jack. This question is a bit beyond my expertise, but I can suggest some general answers to your ...
|
| Biology | 10/27/2007 |
Q: What does it mean to be a successful organism?
A: Angela. Success, in biological terms, has two main components: reproductive success and ...
|
| Calvin Cycle | 10/26/2007 |
Q: I am struggling with an answer for the Calvin Cycle. The question is "Which of the following are ...
A: Kelly. Carbon dioxide is part of the reactants for the Calvin cycle, and eventually becomes the ...
|
| Mitosis vs. Meiosis | 10/13/2007 |
Q: i understand the basic principle of the meiosis vs mitosis, and the differences and similarities ...
A: Tiffiny. Meiosis, as you already know, occurs in two nearly identical phases that may be separated ...
|
| memory | 10/12/2007 |
Q: I am 47 years old and I'm in my first year of college. My question is, is there a good way to ...
A: and congratulations on your entrance to college. I wish you great success. First, it's necessary to ...
|
| plauges in ancent rome | 10/8/2007 |
Q: did plauges reduce the population to the point it could not sustain itself?
A: I'm afraid that I don't have enough information to answer your question as stated. Are you referring ...
|
| osmosis | 10/7/2007 |
Q: Does osmosis require a differentially prmeablemembrance and a concentration gradient for water?
A: Andrew. Osmosis requires both a difference in concentration of solute at two different points in a ...
|
| bio | 10/2/2007 |
Q: where does co2 come from in photosynthesis
A: Laura. The carbon dioxide that plants use in photosynthesis is absorbed from the atmosphere, which ...
|
| microbio | 10/1/2007 |
Q: My question is probably not like many that you have received before. I am 35 years old and ...
A: Eric. I have some suggestions, both practical and more general, for your predicament, but I also ...
|
| Biology | 9/25/2007 |
Q: where can I find Information about cells that are in g0 phase and why are they there
A: A complete description of G0 would require more space and more detail than I'm able to provide here, ...
|
| bio | 9/24/2007 |
Q: does meiosis occur in all cells? if not which cell types does it occur?
A: Laura. Meiosis produces four haploid cells from a single diploid, eukaryotic cell. The resulting ...
|
| dog urine | 9/23/2007 |
Q: our new dog will not urinate in the grass but will all over my childs sanbox and other toys along ...
A: Andy. I'm not an animal psychologist or trainer, so I can't suggest to you how to get your dog to ...
|
| chemistry | 9/20/2007 |
Q: if its ok to ask more than 1... (1)which of the following will result in a chemical change? ...
A: It's certainly fine to ask more than one question on AllExperts, but many of us do prefer that you ...
|
| bio | 9/19/2007 |
Q: i was wondering what are the basic steps in dna replication
A: Laura, thanks for using AllExperts. DNA replication is a fairly complex process, and to describe it ...
|
| biology | 9/16/2007 |
Q: Is a rabbit a rodent?
A: Kate. A rabbit is actually part of a group of animals known as lagomorphs, which also includes pikas ...
|
| Bioliogy | 9/13/2007 |
Q: How do the chemical characteristics of carbon affect the characteristics of organic molecules?
A: Austin. Carbon has a valence of four electrons, which means that it wants to gain or lose four ...
|
| Bacteria | 9/9/2007 |
Q: This question is kind of trivial I suppose, but I work in a restaurant, and people tend not to ...
A: "And as for sanitation I was going to say that I think food floating in the water actually seems to ...
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| Atoms. | 9/6/2007 |
Q: Hey. I'm stuck on atoms and how to find the valency. I also don't know how to find out the e ...
A: Haneen. You will probably have more luck asking your question here, in the chemistry/biochemistry ...
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| Bacteria | 8/28/2007 |
Q: This question is kind of trivial I suppose, but I work in a restaurant, and people tend not to ...
A: James. You're the first person, if I recall correctly, to notice the name's historical significance; ...
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| Multicellular Prokaryotes | 8/27/2007 |
Q: I have a question that I have tried to find the answers to myself for quite a while now, but I have ...
A: Stan. You've preempted the standard response to this question by mentioning the colonial forms of ...
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| HELP! | 8/26/2007 |
Q: How do phospholipids interact with water to form lipid bilayers?
A: DeAva. Phospholipids don't interact with water in a chemical fashion--that is, there is no chemical ...
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| Parallel Evolution | 8/25/2007 |
Q: One theory has always stated that silicon lifeforms could exist just as often as carbon-based ...
A: Geoff. Silicon, like carbon, can form form bonds to other atoms and displays a number of other ...
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| babies physical appearance | 8/23/2007 |
Q: I have used donor eggs for my IVF cycle. I am pregnant with twins now. Please speculate on my twins ...
A: Cindy. The eye-color question arises so often that interactive websites have developed to show you ...
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| Can't remember this name of this... | 8/21/2007 |
Q: I can't think of the name of this, but I remember hearing that there is a way to tell how close two ...
A: There's a lot of terminology related to this subject, in fact, so let me describe some of the ...
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| Bio | 8/20/2007 |
Q: He needs to write a "hypothesis" on "WHY ARE WHITE SHIRTS COOLER THEN DARK SHIRTS" we then need ...
A: Judy. A point before I begin: many of the respondents here prefer not to answer questions that are ...
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| Fire... | 8/17/2007 |
Q: Okay I know everyone one says that fire is not living, or may say that fire is alive...So I would ...
A: Jordan. Fire is a chemical process in which oxygen is quickly combined with some kind of ...
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| Nervous System | 8/17/2007 |
Q: Now I have question on the nervous system. I'm confused as to how an action potential is generated ...
A: Shaazia. I'm going to take a spatial view of what happens, from the dendrites on the nerve in ...
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| Science | 8/15/2007 |
Q: What is a lymphocyte and what does it do? I'm researching on acute leukemia and there is one type ...
A: Jennifer. A lymphocyte is a particular type of white blood cell; it is part of the immune system, ...
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| black bile | 8/14/2007 |
Q: http://en.wikipedia.org/wiki/Black_bile mentions “black bile”. Although the theory of the humours ...
A: I'll take a shot at this, Simon. While I cannot offer an exact answer (there is no indication that ...
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| biology | 8/9/2007 |
Q: Bar-headed geese fly over the world's highest mountain range, the Himalayas, at heights of 25,000 ...
A: Luis. I'm not immediately familiar with bar-headed geese, but I can suggest possible adaptations ...
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| What Does The Conclusion Mean in Laughter/Diabetes Study? | 8/9/2007 |
Q: It appears laughter can change the genetic expression that leads to type 2 diabetes, at least that's ...
A: Usuff. The conclusion here actually suggests that laughter causes gene changes that make Type II ...
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| Cell | 8/4/2007 |
Q: I would like to know why cell is called the functional unit of life? I searched elsewhere but ...
A: Anjali. Cells are referred to as the functional unit of life for a very practical reason: so far as ...
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| human blood | 7/29/2007 |
Q: In how many seconds blood circulates all over the human body. From heart to heart again?
A: Ali. How quickly blood circulates around the body depends upon a number of factors, so it's ...
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| Genetics | 7/23/2007 |
Q: I am completely stumped. I don't understand Mendel's inheritance theories at all! For instance, ...
A: Charlene. Mendel's theories of inheritance are not always intuitive, to be sure, and to explain ...
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| hello | 7/17/2007 |
Q: John...i would like to ask you that why rodents and mice are used so commonly for scientific ...
A: and I'd be happy to answer your question. Before I can answer it directly, though, I need to ...
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| anatomy | 7/15/2007 |
Q: a neuron has several axonal knobs that are firing, but the neuron in question does not transmitt a ...
A: Amy. There are several possible answers to this question, but the most likely one is that the neuron ...
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| different mammals | 7/12/2007 |
Q: why do echidnas lay eggs?
A: Jeremy. Echidnas and platypi together form a very old group of animals known as the monotremes ...
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| dissappearing body parts! | 7/9/2007 |
Q: Why would a testicle disappear on a man after intercourse? This happened to my fiance! It still is ...
A: Amy. While obviously I cannot dispense medical advice (and I do believe your fiance should see a ...
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| for non-biologists | 7/3/2007 |
Q: I'm wondering if you can name some great books on biology for non-biologists. There are two types ...
A: Luke. There is a great wealth of books on biology, both for the specialist and the non-specialist; I ...
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| dry mouth and balloons | 6/25/2007 |
Q: Why is it difficult to whistle or blow balloons if you have a dry mouth?
A: Laura. I'm not 100% sure of the answer to your question, but I can speculate as to some of the ...
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| biology | 6/11/2007 |
Q: why do we need to study biology?
A: We ARE biology--that is, we are organisms whose survival depends upon our successful interaction ...
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| Blood-brain barrier | 6/10/2007 |
Q: What exactly is the blood-brain barrier made up of, and why is blood toxic to the brain? It seems to ...
A: No problem, James. If you would like to use AllExperts again but your question gets passed off as ...
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| Blood-brain barrier | 6/7/2007 |
Q: What exactly is the blood-brain barrier made up of, and why is blood toxic to the brain? It seems to ...
A: James. The blood-brain barrier is actually a little different from what the name might suggest. ...
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| Length of a Human Optic Nerve | 6/3/2007 |
Q: I was wondering if you could help me on a hopefully easyWhat is the average length of a Living Human ...
A: Daniel. Your question is straightforward but that does not necessarily mean that it is easy: the ...
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| genes | 5/28/2007 |
Q: what are genes?Descibe process of transcription & translation.
A: Ahmad. I need to take a step back to answer your question, starting with how most essential ...
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| Eye coulors | 5/26/2007 |
Q: My husband is a fraternal twin, he has blue eyes and his brother brown,along with the rest of his ...
A: Heather. I can answer your question in two ways: yes, it is possible in the sense that it has ...
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| Heroin and morphine and government policy | 5/22/2007 |
Q: In Alberta, Canada we have a team of business and academics who are requesting permission to grow ...
A: Edwyn. In virtually all countries with strong controls on the production and distribution of ...
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| Genes and DNA | 5/20/2007 |
Q: My sons partner is half aboriginal with an olive complexion and brown eyes. He has ginger hair and ...
A: and I'd be happy to answer your question. Hair color in humans is not well-defined genetically, at ...
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| biology | 5/20/2007 |
Q: What functions do mRNA,tRNA,and rRNA have.
A: and I'd be happy to answer your question. Rather than reiterate what many excellent sites on the ...
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| cell-signalling | 5/19/2007 |
Q: What happens if multiple signals activate one cell membrane receptor? What is the response of the ...
A: Unfortunately, I need a bit more information to answer your question directly. As you likely know, ...
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| human body | 5/17/2007 |
Q: Where does fat enter the metabolic pathway? Can you burn fat anaerobically? Why?
A: your question is an excellent one. Fat enters the metabolic pathway in two directions: via the ...
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| Selfish Gene Theory | 5/15/2007 |
Q: I am a Ph.D. Psychology student in Germany, and I am extremely interested in how biological ...
A: I realize that you have already received an answer saying that this is outside my expertise. Let me ...
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| DNA replication | 5/15/2007 |
Q: How many genes undergo DNA replication before meiosis?
A: Julie, thank you for using AllExperts and I'd be happy to answer your question. All genes undergo ...
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| electrophoresis and barr body | 5/13/2007 |
Q: Locke, I tried to ask barbara a question, but she thought it's my homework, so she didn't answer it. ...
A: I understand that you are serious about having this answered, and also understand that this is not ...
|
| gravitropism | 5/4/2007 |
Q: I'm doing a HUGE project on gravitropism. I am supposed to have a human resource. No one knows about ...
A: Mallory, thank you for using AllExperts and I'll try to answer your question. First, let me say ...
|
| 2 things | 5/3/2007 |
Q: How do sperms carrying y chromosomes live if x is essential for life? And what determines which ...
A: Sara, thank you for using AllExperts and I'll be happy to answer your questions. Your first ...
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| Excretory System | 5/2/2007 |
Q: I am currently learning about the excretory system in my high school biology 20 course and am stuck ...
A: Stephanie, thank you for using AllExperts and I'd be happy to help you answer your question. To ...
|
| Our body and warmth. | 4/27/2007 |
Q: Why do we feel 25°C and over as "hot" and why do we start sweating at around those temperatures, ...
A: Jeronimo, thank you for using AllExperts and I'd be happy to answer your question. This question ...
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| digestive system | 4/22/2007 |
Q: 1. what is insulin? 2. what is the use of a pancreas?
A: and I'd be happy to answer your question. The body has two general ways of regulating the ...
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| biology -- human body | 4/17/2007 |
Q: 1. Rice is a form of starch ..is porridge a form of starch too? 2. Food is pushed down the ...
A: 1. Porridge is indeed a form of starch. Porridge is made from oats, of course, meaning that it ...
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| Lichens | 4/14/2007 |
Q: Are lichens considered a species? Why or why not?
A: Amy, thank you for using AllExperts and I'd be happy to answer your question. The simple answer is ...
|
| Taste buds | 4/14/2007 |
Q: Does the human tongue have definite areas for certain tastes?
A: Ria, thank you for using AllExperts and I'd be happy to answer your question. The simple answer is ...
|
| Biology | 4/13/2007 |
Q: How is polydactyly inherited?
A: Benny, thank you for using AllExperts and I'd be happy to answer your question. Polydactyly occurs ...
|
| Can A Plant Survive in an Air Tight Container? | 4/9/2007 |
Q: If we can assume that the plant is potted in soil, supplied with water and has 12 hours of light ...
A: Kristen, thank you for using AllExperts and I'd be happy to answer your question. The answer is no. ...
|
| Prions in Kuru | 4/9/2007 |
Q: Jared Diamond in Guns, Germs and Steel, (p.198)refers to the "virus causing laughing sickness (kuru) ...
A: Edwyn, thank you for using AllExperts and I'd be happy to answer your question. To put it briefly, ...
|
| Biology | 4/7/2007 |
Q: I understand the basic steps to the seperation of pigments by chromatography, however I don't ...
A: Chelsea, thank you for using AllExperts and I'll be happy to answer your question. I must apologize ...
|
| Biology 1406 | 4/7/2007 |
Q: What wavelengths in the visible spectrum are most effectively absorbed by chlorophyll? I answered--- ...
A: Chelsea, thank you for using AllExperts and I'd be happy to answer your question. To put it simply, ...
|
| digestion | 4/5/2007 |
Q: what is the link between digestive reactions and nerve impulses
A: Marcus: Thank you for writing to AllExperts; I'll be happy to answer your question. The digestive ...
|
| DNA and Proteins | 3/26/2007 |
Q: What would you use for an equation to show how DNA tells cells to make proteins?
A: Victoria. Every person who understands the way DNA works will have a slightly different take on ...
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| Dihybrid crosses | 3/21/2007 |
Q: could you please check these and let me know if i did them right what are the genotypic and ...
A: Jim, thank you for using AllExperts and I'll give you some advice as to your question. I don't ...
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| the unit of measurement that scientists use to determine the diameter of an animal cell is the? | 1/18/2007 |
Q: a.millimeter b.micrometer c.nanometer d.meter
A: Tami, thank you for using AllExperts, but many of the people here prefer not to simply answer ...
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| Blood circulation | 1/14/2007 |
Q: We saw a sign at the Bodies exhibit that said that each drop of blood in an adult human goes through ...
A: John. The answer to your question is yes; at rest, the heart pumps at such a rate that the blood ...
|
| Origin of Life | 1/11/2007 |
Q: I understand that life is thought to have begun in water approx. 4 billion years ago. What do ...
A: Ralph, thank you for using AllExperts; I'll give answering your question a shot, with the caveat ...
|
| Amputation | 1/8/2007 |
Q: If somebody's penis were to be amputated, could it be safely reattached. Would it have all of its ...
A: Franco, thank you for using AllExperts. I pulled this question out of the question pool because ...
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| How will the drug affect urine formation? | 1/8/2007 |
Q: A drug inhibits the formation of ATP by the cells of the proximal tubule is introduced into the ...
A: Marius, I cannot provide a complete physiological explanation, but let me give you some ...
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| eye color | 1/3/2007 |
Q: This was an extra credit question on one of my A&P exams in college, no one got the answer. What ...
A: Christine. There's two ways to answer thisone, blue eyes are blue because of the single pigment ...
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| eye color | 1/2/2007 |
Q: I may be forgetful, but I seemed to remember that certain parental eye colors cannot produce ...
A: Scot. This are both questions we get fairly often, but they do have a well-defined answer. Let me ...
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| inter marriage | 1/2/2007 |
Q: I recently returned from a trip to Hawaii, while on an excursion of Maui, the tour guide told us the ...
A: Kay. The answer is very simply, absolutely, the practice is dangerous and contributes to higher ...
|
| sciatic nerve | 10/28/2006 |
Q: Where does sciatic nerve runs under? Is the ansver (gluteus medius) correct? Does it runs under ...
A: Ulia. I've pulled this question out of the Question Pool in order to clarify for you, while ...
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| biology/environmental science | 10/24/2006 |
Q: im currently doing e.science for AS and i have a question im quite stuck on! i understand what ...
A: Millie. I realize that this response is late, but we're on a push here to clear out the question ...
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| biology | 10/20/2006 |
Q: i would like to know the production & utilization of ATP & NADPH/NADH in animal and plant cells, and ...
A: Dennis. Describing the entire process from start to finish--which contains at least four separate ...
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| body's ability to maintain homeostasis | 10/19/2006 |
Q: Give an example of the body's ability to maintain homeostasis
A: Cassie. I'll give you a few examples, though it is up to you to research these more in depth ...
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| Biology | 10/19/2006 |
Q: What happens to the blood in order for it to get oxygen from the lungs to the muscle. What happens ...
A: Kim. The whole heart/lung/respiration cycle is quite complex, and describing here as text-only would ...
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| biology | 9/29/2006 |
Q: you can peel a raw egg w/out breaking the membrane or "melt" away the shell in vinegar, if you place ...
A: Tom. The egg shell is an example of semipermeable membrane, or one which allows only certain ...
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| evolution | 9/16/2006 |
Q: My relations are very religious and they do not except evolution. I know it was the way all life has ...
A: Ed. While I cannot give you something that will cause your relations to accept evolution as ...
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| principles of ecology | 9/8/2006 |
Q: Ecologists may use both descriptive and quantitative methods of research in their studies. Is this ...
A: Ashleigh. This is absolutely true. Examples of quantitative measures are biomass and mathematical ...
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| belly buttons | 9/5/2006 |
Q: I've been watching a show called Kyle XY. In short, it's about a boy with amnesia and no belly ...
A: Adam. All placental mammals have some form of a belly button--although it doesn't always look like ...
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