ATP contains ____ high-energy phosphate bonds.
A. one
B. two
C. three
D. four
B. two
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Thorough mixing of oxygen and nutrients
within lakes in temperate regions occurs in a. winter and summer. b. winter and spring. c. spring and summer. d. spring and autumn. e. summer and autumn
The human biceps and triceps muscles may be described best as working
a. independently. b. synergistically. c. antagonistically. d. synchronistically. e. involuntarily.
The methanogenic archaeans are ____ that pull electrons from ____.
A. chemoautotrophs; oxygen B. chemoheterotrophs; carbon dioxide C. chemoautotrophs; water D. chemoheterotrophs; methane E. chemoautotrophs; hydrogen gas
A reservoir is
A) a source of microbial contamination. B) an environment that is free of microbes. C) any microorganism that causes disease. D) a condition in which organisms remain in the body for a short time. E) a source of microbes for laboratory testing.