2008 AP Biology Released Exam?Multiple Choice and Grid-In Questions Free Download
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1)The amino acid sequence of cytochrome c is exactly the same in humans and chimpanzees. There is a difference of 13 amino acids between the cytochrome c of humans and dogs,? and a difference of 20 amino acids between the cytochrome c of humans and rattlesnakes. Which of the following statements is best supported by these data?
Rattlesnakes apparently gave rise evolutionarily to the dog, chimpanzee, and human.
Cytochrome c apparently has an entirely different function in rattlesnakes than in mammals, which explains the difference in the number of amino acids
Cytochrome c is not found universally in animals
Cytochrome c from a rattlesnake could function in a dog, but not in a chimpanzee
The human is apparently more closely related to the chimpanzee than to the dog or rattlesnake
2)A parasite may be described as an organism that derives nourishment form another living organism and
becomes necessary to the life of the host
is neutral in its effect on the host
benefits the host nutritionally
provides a supportive structure for the host
harms the host in the process
5)Countercurrent exchange in the gills of fish is an adaptation that accomplishes which of the following?
It limits the amount of blood going to the gills
It decreases the thermal gradient between water and blood
It improves the ability of blood to dissolve oxygen
It maximizes oxygen transfer from water to the blood