We expect that a keystone species that is a predator will?

Question

A. More then one of the choices is correct

B. maintain the species diversity

C. help many of its prey reproduce

D. be a parasite

E. harvets prey species down to extinction

Answer 1

B Is obvious, a keystone species is a species whose signifigance in the ecosystem is greater than its numbers. Oftentimes when a keystone predator is removed, species diversity suffers. C is a possibility, if it preys on more than one prey species, it may be a competitive release for both prey organisms, so maybe the answer is A?

Answer 2

I would have gone with B alone, but Carlos has convinced me that C also could be an option, even though it is counterintuitive to think of a predator helping its prey reproduce.  Very thoughtful!