One possible test for classifying contemporary animals into genera is to check for results of hybridization between:
a. individuals of different species.
b. individuals of the same species.
c. individuals of the same order.
d. two males only.
e. two females only.
Question 2
A genus may be defined as a group of
a. reptiles.
b. closely related species.
c. species that live in very different adaptive zones.
d. mammals.
e. individuals who interbreed but are reproductively isolated from other such groups.
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