Which of the following is most likely to decrease genetic variation?
A) directional selection
B) mutation
C) stabilizing selection
D) diversifying selection
C
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The inorganic non-protein components that participate in enzyme catalysis are known as
A. coenzymes. B. cofactors. C. products. D. substrates. E. reactants.
Autoinhibition can reduce enzymatic activity by:
A. reducing the quantity of active enzyme in the cell. B. preventing self-assembly of oligomer. C. requiring a ligand for activity. D. requiring an auxiliary protein for activity. E. All of the choices given are true.
The cells within a morula are referred to as ____
a. stem cells b. endoderm c. ectoderm d. blastomeres e. mesoderm
A positive serological test for tuberculosis indicates that the patient
A. is immune to tuberculosis. B. is an asymptomatic carrier of tuberculosis. C. has active tuberculosis. D. has been exposed to tuberculosis.