SAT Subject Biology Practice Question 290: Answer and Explanation

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Question: 290

20. The best definition of a species is

A. a group of organisms that occupy the same niche
B. a population that works together to defend itself from predators
C. a group of organisms that can mate with each other
D. a population that preys on other populations
E. a population in which all members benefit from the association in some way

Correct Answer: C

Explanation:

C Two populations are considered separate species when they are so different from one another that they can no longer mate and produce viable offspring. Thus, organisms that can mate with each other must be of the same species.

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