A keystone species is an organism that
A) is endangered.
B) plays a crucial role in an ecosystem.
C) is very abundant.
D) lives in coastal regions.
Correct Answer:
Verified
Q42: The smallest marine mammal is a
A) seal
B)
Q43: Objections to the "stepping-stone" hypothesis, suggesting that
Q44: The Chondrichthyes include organisms such as
A) lampreys.
B)
Q45: A group behavior that is much more
Q46: Sea snakes have skin that is
A) impervious
Q48: Birds are homeotherms, meaning they maintain a
Q49: In the perpetually dark bathypelagic zone, fish
Q50: All toothed whales use echolocation, except baleen
Q51: The nekton only include vertebrates such as
Q52: Sea snakes spend less than half their
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