Vestigial traits serve as a strong test of Darwin's theory of evolution by common ancestry. Looking at the fig-ure above, in which limbless organisms would you expect to find vestigial limbs?
a. jellyfish c. fish
b. annelid worms d. snakes
D
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Indicate the differences between protostomes and deuterostomes.
What will be an ideal response?
The function of PUF proteins binding to mRNA is:
A. a shortening of the poly(A) tail. B. the phosphorylation of eIF2a. C. the efficient recruitment of the 40S ribosomal subunit. D. to block efficient translation.
In bacteria, fungi, and plants, the high internal pressure generated by osmosis is counteracted by the mechanical strength of their
A. plasma membranes. B. cytoskeletons. C. cell walls. D. organelles.
What mechanism explains why polar bears are white and bears found farther south have a darker color?
A. continental drift B. inheritance of acquired characteristics C. the common genetic language D. natural selection