Multiple Choice
Norway rats (Rattus norvegicus) and roof rats (Rattus rattus) are different species. Occasionally, mating occurs if the two species are kept together in captivity. The resulting pregnancies are not successful and the embryos die. This is an example of
A) mechanical isolation.
B) hybrid sterility.
C) zygote mortality.
D) lack of F2 fitness.
Correct Answer:
Verified
Correct Answer:
Verified
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