The diagram shown here is an example of a Choose On the branch for mammals, a label for body hair could be
added to show a
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which is a trait that arose in a lineage.

The instructions for making proteins come originally from

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.

What are the three groups of atoms that make up amino acids called