Of all the world's fresh water, nearly ________ percent is tied up in glaciers, ice caps, and snowfields.
A. 25
B. 75
C. 90
D. 50
Answer: C
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Glucose, C6H12O6, is a simple sugar that the body metabolizes into two molecules of pyruvic acid, C3H4O3. Is the glucose oxidized or reduced as it transforms into pyruvic acid?
A. The glucose is reduced. B. The glucose is oxidized. C. Parts of the glucose molecule are oxidized, while others are reduced. D. Glucose is neither oxidized nor reduced as it transforms into pyruvic acid.
Which of the following would be considered a primary producer in a typical food chain?
A) carnivore B) herbivore C) plant D) bacteria
A subduction zone is an example of
a. a convergent plate boundary. b. a divergent plate boundary. c. a transform plate boundary.
The amount of solar heat received equals the amount of solar heat lost in what region?
a. northern polar regions b. mid-latitudes c. tropical regions d. southern polar regions e. equatorial latitudes