They start as single cell orginisms then they evolve from there.
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Answer:
Microclimates exist, for example, near bodies of water which may cool the local atmosphere, or in heavy urban areas where brick, concrete, and asphalt absorb the sun's energy, heat up, and re-radiate that heat to the ambient air: the resulting urban heat island is a kind of microclimate.
Explanation:
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DNA (deoxyribonucleic acid)