Keystone species can have significant influences over several populations in a community through:
A. their ability to leave their environment
relatively unchanged.
B. their large body sizes.
C. their effect on high amounts of biomass
and energy transfer between populations.
D. their roles as prey species for predator
populations in the community.
E. their avoidance of antagonistic
interactions.
C
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Which of the following statements is true concerning an outgroup?
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