A few years after a prey species population decreases, the . A. prey population will exceed carrying capacity B. predator population will exceed carrying capacity C. predator population will increase D. predator population will decrease E. prey population must decrease

D. predator population will decrease

Explanation:

If the population of prey species decreases then the competition between the predator population will increase and natural selection will act on them. So nature will select those individuals among predators who are more fit and adapted and less fit individuals will die.

So a few year after the predator population will decrease as there are not enough prey to support the large population of predators which was present when prey were abundant. Therefore the correct answer is D.

"do a testcross with a homozygous recessive plant."