The point at which the rate that a deleterious allele is being eliminated from a population by natural selection is in equilibrium with the rate at which the deleterious allele is being replaced by a new mutation is termed ________
A) mutation-dependent selection
B) frequency-dependent selection
C) mutation-dependent equilibrium
D) mutation-selection balance
D
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Elastin, the most elastic material known, is found only in insects and some crustaceans
Indicate whether the statement is true or false.
A foramen magnum located at the rear (posterior) of the skull indicates that the animal ________
a. could vary its body position from upright to quadruped b. walked upright c. was a hominid d. walked on all four feet
Which step in the evolution of life is the most
complex and probably occurred last? a. formation of DNA b. formation of protein-RNA systems c. formation of membrane-bound proto-cells d. spontaneous formation of organic compounds under abiotic conditions e. formation of ATP
Which hormone acts to decrease sodium retention in response to elevated blood pressure?
a. ANP b. ADH c. vasopressin d. thymosin e. androgens