A keystone species
a. has a disproportionately large effect on a
community relative to its abundance
b. controls the prey species.
c. may increase or decrease the number of prey
species in a community.
d. has a disproportionately large effect on a
community relative to its abundance, and may
increase or decrease the number of prey species
in a community.
e. has a disproportionately large effect on a
community relative to its abundance, controls
the prey species, and may increase or decrease
the number of prey species in a community.
Answer: e
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