The group of organic molecule polymers with the most complex and diverse three-dimensional structure is
A. unsaturated fats.
B. proteins.
C. waxes.
D. carbohydrates.
E. saturated fats.
B. proteins.
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Which of the following is not an end product for an acetyl group that enters the citric acid cycle?
A. ATP B. NADH C. FADH2 D. CO2 E. oxaloacetate
Which of the following describes a cnidocyte?
a. stinging cell b. outer layer of cells c. reproductive structure d. digestive cell
In comparison to the upper intertidal zone, species in the lower intertidal zone are more apt to
A) be desiccation tolerant. B) have a lower metabolic rate. C) have lower resource requirements. D) be better competitors.
The splitting of carbon dioxide to form oxygen gas and carbon compounds occurs during
A) photosynthesis. B) respiration. C) both photosynthesis and respiration. D) neither photosynthesis nor respiration. E) photorespiration.