Under an evolutionary classification system, species are grouped together based on (a) their shared similarities. (b) how closely related they are to one another. (c) their position in a hierarchy...

Under an evolutionary classification system, species are grouped together based on

(a) their shared similarities.

(b) how closely related they are to one another.

(c) their position in a hierarchy from “simple” to “complex.”

(d) none of these

When a lion mates with a tiger, the offspring are sterile. This is an example of

(a) allopatric speciation.

(b) sympatric speciation.

(c) speciation by hybridization.

(d) a postzygotic reproductive barrier.