Planes maintain an atmospheric pressure equivalent to about 8,000 feet to sustain ____
a. a stable temperature
b. oxygen levels
c. oxygen availability
d. oxygen levels and availability
e. oxygen availability and reduce buildup of carbon dioxide
ANSWER: c
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Which types of cells in the human body do not repair themselves if they have been damaged?
a. Skin b. Bone c. Blood d. Hair e. Nerve
The general term for a state where two organisms live together in close association is ____
a. commensalism b. parasitism c. mutualism d. predation e. symbiosis
________ is a condition caused by Graves' disease (too much thyroid), in which the eyes protrude
Fill in the blank(s) with correct word
The function of chymotrypsin is to:
A) synthesize proteins. B) break down proteins into amino acids. C) synthesize glycogen. D) break down glycogen into glucose.