There are more insect species per square kilometer in
a Brazilian rainforest than there are in a redwood
forest of the Pacific Northwest of the United States.
An explanation for this finding is that
a. the tropics have conditions that more species can
tolerate.
b. species richness may be self-reinforcing.
c. tropical communities have been evolving for a
longer time than temperate ones.
d. the tropics have conditions that more species can
tolerate. and species richness may be selfreinforcing.
e. the tropics conditions that more species can
tolerate, species richness may be selfreinforcing,
and tropical communities have been
evolving for a longer time than temperate ones.
Answer: e
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