All of the alleles in a population make up the ____
a. species richness
b. species abundance
c. genome
d. gene pool
e. species diversity
ANSWER: d
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As big as it is, the ocean is nutrient-limited. If you wanted to investigate this phenomenon, one reasonable approach would be to _____
A) follow whale migrations in order to determine where most nutrients are located B) observe Antarctic Ocean productivity from year to year to see if it changes C) experimentally enrich some areas of the ocean and compare their productivity to that of untreated areas D) compare nutrient concentrations between the photic zone and the benthic zone in various marine locations E) contrast nutrient uptake by autotrophs in marine locations that are different temperatures
Sharks and rays deal with the osmotic stress of living in seawater mainly by
a. active transport of ions into the body through the gills. b. excreting nitrogenous wastes through their kidneys as urea. c. active transport of ions out of the body by chloride cells. d. excreting excess salt through the actions of specialized salt glands in their heads. e. maintaining high levels of urea and trimethylamine oxide in body fluids.
The corpus luteum form from ____
a. the uterine lining b. primary oocytes c. secondary oocytes d. a ruptured follicle after ovulation e. polar bodies
The somatic division of the PNS controls all of the following except the
A. quadriceps muscle. B. skin. C. tendons. D. heart muscle. E. bicep muscles.