Which of the Following Statements About Species, as Defined by the Biological

Multiple Choice

Which of the following statements about species, as defined by the biological species concept, is (are) correct?
I. Biological species are defined by reproductive isolation.
II. Biological species are the model used for grouping extinct forms of life.
III. All members of a species can potentially interbreed.

A) I and II
B) I and III
C) II and III
D) I, II, and III