Which of the following is a disadvantage of an
exoskeleton?
a. It does not provide as efficient a muscle
anchorage as an endoskeleton.
b. It allows for excess water loss.
c. It must be shed for its owner to grow.
d. It is not flexible enough to allow a full
range of movements.
e. It is not able to absorb pigments for
sufficient camouflage
C
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Gap genes are sold in the most fashionable malls in America
A. true B. false
After several generations of artificial selective breeding, a plateau is reached where artificial selection is no longer effective. This is called the _______
A. realized limit B. realized heritability C. selection coefficient D. selection limit
What happens when coleoptiles are illuminated with directional light from the side instead of from directly overhead?
A. More auxin is produced. B. Less auxin is produced. C. Auxin is transported away from the lighted side. D. Auxin is transported toward the lighted side. E. Auxin receptors are activated.
The last shared ancestor for today's cell types is thought to have arisen about _____ years ago.
A. 5 million B. 2 million C. 3 billion D. 4 billion E. 6 billion