An enzyme, such as rna polymerase, that is needed by the cell in large amounts and must usually be present would be called?

Constitutive enzyme

Explanation:

Constitutive enzymes are synthesized by the cell at all times and are required in large amounts. In contrast, Inducible enzymes are synthesized only when required depending upon the availability of substrate and other conditions in the cell.

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the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands