A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations. Gene flow is any movement of genes from onepopulation to another and is an important source of genetic variation.
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There are several examples that can be used as an implied power of Congress. The action that is a correct example, out of the choices given, is establishing the bank of the United States. The correct answer is B.
Your question does not make sense
D because this is the process of when the nitrogenous bases are going to match each other to form our DNA sequence