What is an ecotone?
a. a parasite that is external to the body
b. a parasite that is internal to the body
c. an example of an individualistic hypothesis
d. a zone between two communities
e. the combination of species in an environment that is constant
ANSWER: d
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An organism's is its position in the food chain, relative to the ecosystem's energy source.
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Indicate whether the statement is true or false