A Certain Species of Animal Represents Just 3% of the Biomass

Multiple Choice

A certain species of animal represents just 3% of the biomass in its ecosystem. We might classify this as a keystone species if its removal:

A) allowed an even rarer species to increase in numbers and take its place.
B) caused 2% of the other species in the community to disappear.
C) caused the diversity of the plant community to decline by 40%.
D) caused plant biomass to increase by 5%.
E) had no effect on the community whatsoever.