Chthamalus stellatus and Semibalanus balanoides do not coexist in the same tidal zones because
A. C. stellatus outcompetes S. balanoides.
B. S. balanoides outcompetes C. stellatus.
C. The two species require different resources.
D. S. balanoides preys on C. stellatus.
Answer: B
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Fill in the blank with the appropriate word.
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The sea otter is an omnivore that makes up a small portion of the community by weight, yet strongly influences the health, dynamics, and diversity of the entire community of other oceanic species around it. This is an example of a species.
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