A Keystone Species Is One

Multiple Choice

A keystone species is one

A) that makes up a very large proportion of total community biomass.
B) that feeds on a very large fraction of all available prey species.
C) that is fed on by a very large fraction of all predators in its community.
D) whose feeding activities have a disproportionate effect on the structure of its community.
E) that occupies the lowest level (the base) of the food web.