In which of the following biomes would you expect to find the highest abundance of large, grazing mammals?
A) tropical rain forest
B) chaparral
C) temperate grassland
D) desert
E) temperate forest
Answer: C) temperate grassland
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You notice that your houseplants are all growing toward the light from your window. This indicates that their stems display:
A. positive gravitropism. B. positive thermotropism. C. positive phototropism. D. negative phototropism. E. negative gravitropism.
During which phase of aerobic respiration is ATP
produced directly by substrate-level phosphorylation? a. glycolysis b. ethanol production c. acetyl-CoA formation d. the Krebs cycle e. glycolysis and the Krebs Cycle
The term reproductive isolation mechanism refers to
a. specific areas where males compete or display for females. b. the process by which sexual selection evolves within a population. c. a blockage of gene flow between populations. d. the inability of a species to continue reproduction. e. legal limits to procreation.
PTH is necessary to produce calcitriol (activated vitamin D), which is necessary for the movement of calcium through cells. In this case, how would you characterize PTH?
A) permissive B) antagonistic C) submissive D) synergistic