Use the following information to answer the question(s)below. Two populations of birds with somewhat different colouration live on opposite sides of an island.The habitat between the populations is not suitable for these birds.When birds from the two populations are brought together,they produce young whose appearance is intermediate between the two parents.These offspring will breed with each other or with birds from either parent population,and all offspring of these pairings appear intermediate to various degrees. -What keeps the two populations separate?
A)temporal reproductive isolation B)lack of hybrid viability C)behavioural reproductive isolation D)habitat isolation E)C and D
Theoretically,the production of sterile mules by interbreeding between female horses (mares)and male donkeys (jacks)should
A)result in the extinction of one of the two parental species. B)cause convergent evolution. C)strengthen postzygotic barriers between horses and donkeys. D)weaken the intrinsic reproductive barriers between horses and donkeys. E)eventually result in the formation of a single species from the two parental species.