The action of two hormones working together to accomplish the same result is called:
A. synergism.
B. antagonism.
C. stimulation.
D. inhibition.
Answer: A. synergism.
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A family can share a genetic risk of developing cancer if:
A. the cancer is caused by somatic cell mutations. B. the cancer is caused by germ-line mutations. C. a germ-line mutation in one of the genes implicated in the cancer occurred in an ancestor. D. a somatic cell mutation in one of the genes implicated in the cancer occurred in an ancestor. E. All of the answer options are correct.
Intertidal zones are determined by: a. the substrate
b. the depth of water at high tide. c. amount of sunlight available. d. the amount of exposure between high and low tide.
What is the correct path a smell sensation takes on its way to the brain?
a. mechanoreceptors ? olfactory bulb ? olfactory tract ? cerebrum b. chemoreceptors ? olfactory bulb ? olfactory tract ? cerebrum c. mechanoreceptors ? olfactory tract ? olfactory bulb ? cerebrum d. chemoreceptors ? olfactory tract ? olfactory bulb ? cerebrum e. chemoreceptors ? olfactory bulb ? olfactory tract ? cerebellum
The condition of having no sperm in the semen is called _____________. Fill in the blank(s) with the appropriate word(s)