When you sit quietly on the couch and read, output from the _____ system prevails
a. sympathetic c. both prevail
b. parasympathetic d. neither prevails
B
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WHich of the following glands may function in helping to control the reproductive cycle?
a. thyroid b. pineal c. thymus d. pancreas e. kidney
The most common cause of low sperm count in males is _____
a. varicocele b. undescended testicles
c. testicular failure d. semen disorders e. obstructions
One would think that deleterious genes would be eliminated by natural selection, yet we have two human genetic
disorders with a high carrier frequency, sickle-cell anemia and cystic fibrosis. Why has this high frequency for these conditions remained in the population? What will be an ideal response?
If you add the plant hormone auxin to one side of a plant, the cells exposed to the auxin elongate. If you measured auxin levels in plant cells exposed to light, what you would you expect to find?
A. They would be lower, causing the plant to bend toward the light. B. They would be lower, causing the plant to bend away from the light. C. They would be higher, causing the plant to bend toward the light. D. They would be higher, causing the plant to bend away from the light.