Which of the following statements about species, as defined by the biological species concept, is (are) correct? I. Biological species are defined by a group of organisms that can successfully interbreed with each other.II. Biological species are the model used for grouping extinct forms of life.III. The biological species is the largest unit of population in which homologous structures can be identified.

a. II only
b. I only
c. II and III
d. I, II, and III
e. III only


Answer: b. I only

Biology & Microbiology

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