Living things contain four major types of carbon-based molecules. The organic molecules in living things fall into four major groups— carbohydrates, lipids, proteins, and nucleic acids. You may already be familiar with these types of molecules and their functions.
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D. sum of all chemical reactions in an organism
<span>Human weight at the time of birth is influenced by stabilizing selection. Stabilizing selection, also known as negative selection, purifying selection or normalizing selection, is a type of natural selection in which genetic diversity decays according to a particular value of the character. This is the most common mechanism of action of natural selection.</span>
