The two divisions of the peripheral nervous system are the ______ system, which controls skeletal muscle, and the ______ system, which regulates the smooth muscle of organs and glands.
a. somatic; autonomic
b. sympathetic; parasympathetic
Ans: a. somatic; autonomic
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A culture performed on a vaginal specimen collected from a 60-year-old woman would likely grow primarily:
a. group B hemolytic streptococci. b. staphylococci and corynebacteria. c. Enterobacteriaceae, streptococci, staphy-lococci, lactobacilli, and anaerobes. d. G. vaginalis, Prevotella spp., Peptostrep-tococcus spp., and Mobiluncus spp.
Scientists have discovered that when they provide supplemental food for hares, their density tripled. The figure above shows cycles of lynx and hare populations over a century's time. What do you predict would happen to the lynx and hare populations in an area where hares were provided supplemental food for one year?
A. The lynx population and the hare population would increase simultaneously, and stay at a stable high level permanently.
B. The hare population would increase, but the lynx population would be unaffected.
C. The lynx population would decrease as hares increased due to exploitative competition, then slowly rise back to the original level.
D. The lynx population would increase 1-2 years after the hares increased, then both would continue cycling down and up.
Coral reef invertebrates mainly feed during
a. day time. b. night time. c. early morning. d. early evening. e. spring tides.
Which of the following vitamins is not stored in fat?
a. A b. K c. C d. D e. E