Answer:
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Answer:
heron and perch or fox they are
Ecosystems equilibrium is when populations of organisms in the ecosystem are balanced.
I think the correct answer from the choices listed above is the last option. The control group to be used to test the hypothesis would be the swallows with average-length tails. A control group <span>is defined as the </span>group<span> in an experiment or study that does not receive treatment by the researchers.</span>
the atom that is most closely associated to living things is carbon
