<em>Answer:</em>
Mutations in DNA that do not have an observable effect on the organism's phenotype.
<em>Method:</em>
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The answer will be that it is not true and that the percentage of calories that are eaten are actually used. <span />
The rough endoplasmic reticulum. The rough ER is responsible for protein synthesis, so they should be abundant in cells that secrete a lot of digestive proteins.