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.
E
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