What is the result of resistance exercise?
A) Existing muscle cells increase in diameter.
B) The number of muscle cells increases.
C) More mitochondria develop.
D) New blood vessels develop.
A
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The fruits of legumes:
A. are fleshy and sweet and are dispersed by birds B. are winged and dispersed by wind C. split down both sides and the seeds fall out D. have corky hulls that make them buoyant and are dispersed by water E. have hooks that cling to mammals and are dispersed by them
Diane Dodd raised different fruit fly populations on different food sources. She found that after about 40 generations the evolution of reproductive isolation was under way. The mechanism of evolution responsible for this was
A) natural selection. B) genetic drift. C) gene flow. D) hybridization.
Why does a person continue to breathe heavily after prolonged activity?
A) no reason B) to relieve fatigue C) because of lack of water D) to relieve O2 debt
Which of the following is an accidental parasite of humans?
A. Ascaris lumbricoides B. Acanthamoeba C. Balantidium coli D. Entamoeba histolytica E. Plasmodium