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About Dana Krempels, Ph.D.
(Top Expert on this page)

Expertise
I can answer biology-related questions in the areas of evolution, zoology, botany, genetics, and ecology. But I don't answer homework questions or provide ideas for your science fair projects. So students please do your learning the right way by reading your text assignments and studying!

Experience
At the University of Miami, I teach Evolution and Biodiversity, Botany, Zoology, Genetics, Ecology, and a variety of seminars (e.g., the Biology and Evolution of Human Gender Roles).

Education/Credentials
I have a B.S. in Biology and an A.B. in English from the University of Southern California (1980). I earned my Ph.D. in Biology in the area of evolutionary biology/visual physiology from the University of Miami in 1989.

Past/Present Clients
I am currently an "expert" in both the "Rabbits" and "Wild Animals" categories.

   

You are here:  Experts > Science > Biology > Biology

SubjectDate AskedExpert

genes11/5/2009Dana Krempels, Ph.D.
  Q: 1- Do the genetic factore have any affects on prtection from A.I.D.s (H.i.v) illness ? 2- do the ...
  A: 1 - Yes, very likely. Although most people are susceptible to infection by HIV, there are a few ...
help...reallly important11/5/2009John Locke
  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 ...
eye colour genetics11/4/2009Dana Krempels, Ph.D.
  Q: I have a question about eye colour. I have blue eyes but my father has brown eyes and my mother has ...
  A: Human hair, eye, and skin color are very complex and difficult to predict, because each of these ...
Define 'Preformed' Organic Molecules as Applies to Heterotrophs11/4/2009John Locke
  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 ...
digestive system11/4/2009Walter Hintz
  Q: The human large intestine is the site of a symbiotic relationship.explain.
  A: I just answered this question froma guy in Canada. When two separate species live togethe rfor ...
the digestive system11/4/2009Walter Hintz
  Q: i do not understand this question The human large intestine is the site of a symbiotic ...
  A: Our intestine is occupied with species if bacteria that are symbionts. Symbiosis is the living ...
knee problems in Zulu people11/3/2009Dana Krempels, Ph.D.
  Q: i was wondering if you could point me in a direction or help me out with your knowledge,we were ...
  A: Environment and genetics both play a role in the reslience of any body part to injury. But I am not ...
Urine11/3/2009John Locke
  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 ...
Diabetes11/3/2009Dana Krempels, Ph.D.
  Q: How Is Diabetes related to Biology?
  A: Diabetes is a disorder in which the body does not properly process sugar, and it can manifest in ...
Length of time until new genetic mutations reveal themselves11/1/2009Dana Krempels, Ph.D.
  Q: how long does it take for new/unique genetic expressions to reveal themselves in populations of ...
  A: That depends on the mutation. A dominant allele can manifest in the first generation, even if it's ...
Circulation10/31/2009John Locke
  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 ...
Viable offspring from transgenic organisms10/31/2009Dana Krempels, Ph.D.
  Q: I would like to ask whether transgenic organisms (plants or animals) created in the lab usually ...
  A: Most transgenic organisms created in the laboratory are perfectly capable of reproducing. The ...
bilogy10/30/2009Walter Hintz
  Q: why does natural selection acts on the Phenotype and not the genotype of an organism
  A: The phenotype is the expression of the genetic code and it is the genetic makeup that natural ...
Hooves10/29/2009Dana Krempels, Ph.D.
  Q: How do hooves grow and how does the environment effect on the sizes of the hooves? Thanks
  A: Hooves are homologous to our fingernails (they develop from the same embryonic sources in the ...
interview10/27/2009Walter Hintz
  Q: I was wondering if you would be interested in answering an interview? I am doing a project on what ...
  A: 1 Mostly gram positive rod shaped bacteria. Bacillus species. Also harmless staph species 2 The ...
biology and physiology10/27/2009Walter Hintz
  Q: What are the changes in body structures and functions which dont let the dead person come to life ...
  A: Cellular activity depends upon the proper functioning of the cellular membranes and these activities ...
Blonde Asians10/27/2009Dana Krempels, Ph.D.
  Q: I was wondering how myself and some (4 of 8) siblings ended up with natural blonde hair when our ...
  A: Human hair, eye, and skin color are very complex and difficult to predict, because each of these ...
My grandchild's hair and eye color?10/26/2009Dana Krempels, Ph.D.
  Q: My daughter-in-law's eye color is green with light brown/blond hair. My son has blue eyes and red ...
  A: Human hair, eye, and skin color are very complex and difficult to predict, because each of these ...
biology- energy10/25/2009Walter Hintz
  Q: I am am doing a study of comparison on an energy drink (red bull and pepsi) and what some of the ...
  A: 1. The combo of high sugar and caffeine speeds up thr metabolic rate resulting in greater energy ...
question about mutation10/24/2009Dana Krempels, Ph.D.
  Q: Good morning There is a great question which confuses us in schools about reasons of multion ( ...
  A: I believe you are referring to mutation, any change in the DNA that encodes the instructions for ...
SLEEPING!!10/23/2009Dana Krempels, Ph.D.
  Q: I WANT TO ASK WHY DO WE AUTOMATICALLY FEEL SLEEPY IN THE NIGHT?? IF WE SLEEP ALL THE DAY YET WE FELL ...
  A: Almost all living organisms experience what's known as Circadian rhythms. These are natural cycles ...
Biology- Genetics10/23/2009Dana Krempels, Ph.D.
  Q: I am curious to know what colour hair our baby will have My gradnfather (mums dad) was a red head. ...
  A: Human hair, eye, and skin color are very complex and difficult to predict, because each of these ...
Bee vision colour yellow10/23/2009Dana Krempels, Ph.D.
  Q: I have read that bees can see blue and ultraviolet but not red, which probably appears as black to ...
  A: Ah, sorry I misunderstood your question. The arthropod eye is completely different from that of a ...
Baby's hair color10/21/2009Dana Krempels, Ph.D.
  Q: Krempels I am curious as to what color hair my baby may possibly have. I have medium blonde hair ...
  A: Human hair, eye, and skin color are very complex and difficult to predict, because each of these ...
Bee vision colour yellow10/21/2009Dana Krempels, Ph.D.
  Q: I have read that bees can see blue and ultraviolet but not red, which probably appears as black to ...
  A: Because color is a psychophysical phenomenon, we cannot really predict how bees perceive what we ...
Biology10/21/2009John Locke
  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 ...
sodium chloride10/20/2009Walter Hintz
  Q: Salt is made up (I read) of 40% sodium and 60% chlorine, making a compound sodium chloride. So with ...
  A: Nutritional information on a package lists ingrediants by weight of a serving I nave a jar of ...
bio10/20/2009John Locke
  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) ...
Height10/19/2009Dana Krempels, Ph.D.
  Q: 5
  A: Human growth hormone is produced by the pituitary gland. You can read more here: ...
biology10/19/2009John Locke
  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 ...
When is a moustache not a moustache?10/18/2009Dana Krempels, Ph.D.
  Q: Q1- i want to ask that our mustache is grown under our nose why not on our cheek or on some where ...
  A: Your question really is about evolution, and why our species facial hair trait is the way it is. ...
Anatomy10/17/2009Walter Hintz
  Q: I would like to know how can I make an heart model. It is for a school project and it is meant to ...
  A: I may be a biologist Jose but when it comes to creative art projects I am a flop. To make a heart ...
Biology10/16/2009Paras Anand
  Q: When vesicles from the Golgi apparatus deliver their contents to the exterior of the cell, they add ...
  A: Just as many processes add membrane to the PM, similarly membrane is also taken from the PM and ...
i need help?10/16/2009John Locke
  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 ...
Science project on water purification10/15/2009Walter Hintz
  Q: I am a middle school student looking for some help on water purification.i will ask a few Q's: 1. ...
  A: Water condensation on the outside of a cup has condensed from the air outside but the temperature ...
When is a moustache not a moustache?10/15/2009Dana Krempels, Ph.D.
  Q: Q1- i want to ask that our mustache is grown under our nose why not on our cheek or on some where ...
  A: The "moustache" is called the moustache *because* it grows under the nose. That's the name that ...
baby10/14/2009Dana Krempels, Ph.D.
  Q: my moms side of the family all have dark hair and dark eyes my fathers side half half dark hair and ...
  A: Human hair, eye, and skin color are very complex and difficult to predict, because each of these ...
genetic code10/13/2009Dana Krempels, Ph.D.
  Q: How could genetic code evolve as a results of random mutations (ie errors) and the other mechanism ...
  A: I must answer this question by saying: No one truly understands the answer to this question yet. ...
Osmosis procedure10/12/2009Walter Hintz
  Q: I have an "experiment" if you will that I have to record data on. The only information given is ...
  A: Question 1. The tubing only simulates a cell membrane because it allows water to pas through ...
Hair, skin and eye color genetics10/12/2009Dana Krempels, Ph.D.
  Q: two questions. 1.) can a child end up with blonde hair and blue eyes if it does not show up in ...
  A: Human hair, eye, and skin color are very complex and difficult to predict, because each of these ...

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