Which of the following does not belong?
a. phospholipids
b. polysaccharides
c. unsaturated fats
d. steroids
e. saturated fats
Answer: b
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Which of the following plants are widely
planted in cities because of their resistance to insect predators, air pollution, and disease? a. horsetails b. ginkgos c. pines d. spruces e. junipers
Selection pressures acting on a population may favor
a. individuals at the left end of the range of variation. b. individuals at the right end of the range. c. extreme individuals at both ends of the range. d. the intermediate individuals within the range. e. all of these.
Activation of the sympathetic nervous system
a. causes the pupils of the eye to dilate. b. causes the release of ACh. c. stimulates peristaltic contractions of the intestinal system. d. slows heartbeat and lowers blood pressure. e. allows the body to relax rather than prepare for fight or flight.
The dietary carcinogen aflatoxin can be found in
A) fresh fruits. B) red meats. C) salt. D) alcohol. E) raw peanut butter.