Griscelli syndrome, a disease caused by mutations in the gene encoding Rab27a, is characterized by abnormal
a. transport of melanosomes.
b. export of neurotransmitters.
c. export of vesicles in T lymphocytes.
d. Both a and c
Answer: d. Both a and c
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The evolution of saber teeth in a number of groups of extinct carnivorous mammals is an example of
A. homoplasy caused by convergence. B. homoplasy caused by common descent. C. homoplasy caused by evolutionary reversal. D. homology caused by convergence. E. homology caused by common descent.
A molecule becomes reduced when it ________
a. gives up an electron b. is degraded into smaller products c. releases a hydrogen ion d. gains an electron
Describe antagonistic muscles. How do muscles work as levers? Define origin and insertion
What will be an ideal response?
According to the above table, the foraging
characteristic that would benefit an animal most in a stable ecology would be? a. A baby garter snake captures and eats a slug. b. A sitter because it would have more trouble adapting to a changing environment. c. A forager because it has the ability to adapt quickly. d. Both the sitter and the forager are equally adept in a stable ecosystem. e. All of these would benefit an animal the most.