Answer:
Hybrids are the offspring of two species. A mule is the hybrid offspring of a female horse and male donkey. Because mules are sterile, they are not classified as a distinct species. The biological species concept connects the idea of a species to the process of evolution.
C) mechanical energy.
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Answer:
a
Explanation:
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<span>This can be used as an overall population guideline. The references can be used to make sure that everyone knows what the basic levels of nutrition should be for each group, and how each person or group can achieve those levels on a daily basis.</span>