Breathing rates are automatically increased when _____ levels are _____
a. oxygen; high
b. carbon dioxide; high
c. oxygen; low
d. carbon dioxide; low
e. ATP; low
ANSWER: b
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a. 1 b. 2 c. 3 d. 4 e. 5
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One characteristic that makes Caenorhabditis elegans attractive for developmental studies is:
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