The mesosphere is the coldest layer of the atmosphere.
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Hardwood trees have a lot of bark.
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The main difference<span> is in the presence of a carbon atom. O</span>rganic compounds<span> will contain a carbon atom.</span><span> Do you have answer choices?</span>
C. <em>A process of change in organisms over a period of time</em>
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The answer to the biology question being presented above would be 'sexual reproduction'. Genetic variability is the most important result of sexual reproduction. In this variability, the genes are varied through sexual union and reproduction.