Molecules and ions reabsorbed from the nephron reenter the blood at the ____
a. efferent arteriole
b. peritubular capillaries
c. renal artery
d. afferent arteriole
e. glomerulus
ANSWER: b
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Triggers for germination of seeds include all of the following except ________
a. water penetrating a seed coat b. desiccation c. smoke or burning d. light or darkness
Cardiac muscle cells are associated with
a. bundles. b. a sheath of dense connective tissue. c. voluntary responses. d. cells tapered at both ends. e. communication junctions.
When a nucleic acid undergoes hydrolysis, the resulting subunits are:a
fatty acids. b. amino acids. c. nucleotides. d. carotenoids. e. monosaccharides.
Our agricultural populations are maintained artificially. This means that
A. mutation must be stopped. B. random mating is prohibited. C. gene frequencies are allowed to change. D. asexual reproduction must be prohibited.