The above figure represents
a. neuromuscular junction.
b. muscle fiber.
c. transport proteins.
d. action potential.
e. none of these
A
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If all conditions of Hardy–Weinberg equilibrium are met,
(a) allele frequencies move closer to each generation. (b) allele frequencies change in the direction predicted by natural selection. (c) allele frequencies stay the same. (d) all allele frequencies increase.
The extinction of the _____ during the end-Cretaceous mass extinction allowed mammals to diversify through the process of _____
A. ammonites; peripatric speciation B. dinosaurs; peripatric speciation C. dinosaurs; adaptive radiation D. ammonites; adaptive radiation E. cephalopods; adaptive radiation
When plotted on a graph, logistic growth rates show what type of curve?
a. J-shaped curve b. K-shaped curve c. S-shaped curve d. R-shaped curve
The development of secondary sexual characteristics is due to
A) decreased levels of GnRH. B) increased levels of estrogen or testosterone. C) increased levels of progesterone. D) decreased levels of estrogen or testosterone. E) decreased LH levels.