Respond to statements 86–90 in reference to the five kinds of
species interactions listed below.
a. competition
b. predation
c. mutualism
d. commensalism
e. parasitism
E 86. In this interaction, one species benefits while the
other is neither harmed nor benefited.
M 87. In this interaction between two species, both species
are harmed to some degree.
M 88. In this interaction, both species benefit.
E 89. In this interaction, one individual or species is
usually killed while the other benefits by eating it.
M 90. In this interaction, one species is harmed but usually
not killed, to the benefit of the other that lives on or
in it.
Answers: 86. d, 87. a, 88. c, 89. b, 90. e
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