Multiple choice

Which of the following is not true for a species?

  1. Members of a species can interbreed.

  2. Gene flow does not occur between the populations of a species.

  3. Each species is reproductively isolated from every other species.

  4. Variations occur among members of a species.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

By definition, a species is a group of interbreeding populations that are reproductively isolated from other such groups. Gene flow is a defining characteristic that maintains the cohesion of a species, so stating it does not occur is incorrect.

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