A TRH stimulation test involves measuring basal TSH levels and then measuring again after an injection of TRH. This test is often not necessary for thyroid patients, but would it be beneficial in diagnosing Barbara’s condition? Explain why or why not
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Which pattern most likely came from a gunshot and which one was produced from a blow on the head? explain your answer?

Which is one example of a phenotypic change that is not genetic

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.