Expert: Walter Hintz - 9/12/2007

Question
here are some more to check.
please check carefully, because from liek 11 down i didn't understand most of them, and the ones aboce there are questions below a few of them. thanks.

1.the beaks of a bird and the beak of a giant squid evolved independently and serve the same function. the beaks are _______ structures.
a.convergent
b.phentic
*c.analogous
d.hybrid
...for this 1 my mom said she thinks its a.

2.bacteria reproduce by
a.mitosis
b.meiosis
*c.splitting into identical cells
d.cytokinesis
...and this one she said d.

3.one of the reasons that the incidence of malaria has been one of the increase since the mid-1970s is that
a.DDT is no longer used in most of the world
b.the mosquitoes that spread the malaria parasite have evolved resistance to the insectides that control them
c.global warming has led to a worldwide increase in the number of mosquitoes that spread the malaria parasite
d.none of the above
...i just noticed i didn't have this one answerd, but i think it's c.

4.the haploid form in a platns life cycle is called the
a.sporophyte
*b.gametophyte
c.parental generation
d.alternative generation
...i had b, but i'm now not sure if it's b or a.

5. adrian decided to conduct an experiment on the effects of gibberellins on plant growth for a science project. he chose garden peas for his experiment. he grew a dwarf type of garden pea and sprayed half of his plants with gibberellin ever day for three weeks after germination. the other half of his plants  were not sprayed. at the end of him experiment, he measured the height of all the plants. he found that the dwarf plants that were spreayed with gibberellin were much taller than the unspreayed plants. he concluded that the gibberellin increases the growth rate of pea plants.

how could you modify adrian's conclusion to make it better reflect the results he obtained?

&nd how could adrian have designed his experiment different to make it a better experiment?
...for this one you said he should have measured the leaves, well is that for the first or second ?.
...i had for b...he should have measured the height everydaya and established the conditions of temp., light, ect. of plants, but i don't know what to put for A. please help!?

6.which of the following is usually characteristic of reproduction in a terrestrial enviroment?
a.external fertilization
b.internal fertilization
c.shell-less, water-permeable eggs
d.none of the above
...idk this one. do you?

7.birds retain many replilian features, including
a.teeth
b.a long bony tail
*c.scales on their feet and lower legs
d.none of the above
...is this one c or d?

8.bony fishes : stronger muscle ::
a.bony fishes : lungs
b.sharks : bony skeleton
c.sharks : ray fins
*d.sharks : rows of teeth
...c or d? i think.

9.the world record time for running the mile is just under four minutes. how might this record be different if humans had air sacs like birds do? explain your reasoning.
...idk this one, please help.

10.to help control a species of scale insect that feeds on orange trees, a scientist proposes introducing a parasitic wasp from australia. you are asked to help evaluate the proposal. what are some of the biological issues that you should consider before making your decision? what non-biological issues might you consider?
...i don't know this one either, please help again.
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11.AIDS patients often succumb to infection or cancers that are rare in healthy individuals...true or false?...true, idk.

12.a person with type AB blooc can donate to a person with any blood type...true or false?
true?

13.skeletal system : major organs and body parts ::
a.immune system : against infection
b.nervous system : heart and lungs
c.digestive ssystem : kidneys
d.muscular system : brain and science organs
...i have no clue on these, i never understand them.

14.small intestine : large intestine ::
a.large intestine : small intestine
b.stomach : large intestine
c.esophagus : stomach
d. esophagus : mouth
....don't get this one.

15.excess fluids and proteins are returned to the bloodstream by
a.platelets
*b.arteries
c.the respiratory system
d.the lymphatic system

16.when the diaphram and the rib cage muscles relax,
a.the chest caviity enlarges
*b.inhalation occurs
c.enhalation occurs
d.it is impossible to breathe

17.women are more susceptible to the effects of osteoporosis because:
a.their bones are smaller than those of men
b.they lost calcium during the chilbearing years
c.sex hormones production declines during menopause
*d.all of the above

18.negative feedback is a process that
a.always reduces the amount of hormone present in the blood
*b.keeps conditions near their normal state
c.lowers the body temperature below normal
d.none of the above

19.a nerve impulse may be described as
a.an electrical message
*b.an eletromagnetic message
c.a chemical message
d.a chemical change occuring in the brain.

20.the sudium-ppotassium pump
a.rebuilds axon fiberes
b.restores resting potential
*c.creates stimulus
d.is found only in the peripheral nervous system

21.when we hear,
a.sound waves enter the ear canal and strike the eardrum
b.the fluid in the cochlea moves
c.the auditory nerve carries nerve impulse to the brain
*d.all of the above

22.a reflex
a. may involve two or three nuerons
b.is not under conscious control
c.is not learned
*d.all of the above

23.if a macrophage with antigen molecules on its membrane contacts a helper T cell with a matching receptor,
a.the T cell will secrete antibodies
b.the macrophage will secrete antibodies
c.the T cell will cause killer T cells and suppressor T cells to reproduce
*d.the T cell will kill the macrophage

24.drugs may cause addiction by.
*a. competing with protein receptors for blinding of neutotransmitters
b.stimulating a reduction of protein receptors in synapses, decreasing the sensitivity of the nerve pathway
c.stimulating enzymes that destroy neurotransmitters
d.none of the above

25.short-term effects : nerve impulses :: long-term effects ::
a.adrenal cortex
b.hormones
c.danger
d.axon
...i have no clue

26. why walking through the woods you notice that someone thad carved there initials into the bark of a tree. the initials are exactly 1.5 meters from the ground. how far from the ground will the initald be next year and the year after that? why? discuss groweth tissues in plants in your answer.
...i don't get this one, please help me out.
i thought that maybe it was stay the same, because when the trees grow veryically, they stop and start growing horizontally.

27.explain how the Rh factor can cause problems with pregnancies..
...i have no clue on this one either.

28.epilepsy is a condition that affects one of of every 200 people in the united states. in a halthy human, brain cells produce small bursts of impulses in varying patterns. in a person with epilepsy, large numbers of brain cells accasionally send rapid bursts of impulses simultaneousely, causing the person to have convulsions.

a. how do you explain the symptoms?
b why do ou think the symtoms go away after only a short period of time?
...i really am confused and don't get it, please help!?

Answer
9. Air sacs hold a resavoir of oxygen. Runner would have a greater supply
10. Biological- Will the wasp attack this particular insect. Would the was  attach other helpful bugs
 No Biol  Cost?
12 F
13 I do not know this one either.  My guess would be c
15 d
20 b
25 b
26 Your answer is corre4ct
27  Look up Erythroblastosis fetalis
28 Look up the function of neurotransmitters