If a biologist searches for explanations about natural phenomena solely to satisfy his or her curiosity
and advance our collective knowledge of living systems, then, this researcher is a(n):
a. applied researcher.
b. basic researcher.
c. general researcher.
d. simple researcher.
e. scientist.
B
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Destruction of lymphocytes with self-specificity is called ________.
A. clonal deletion. B. clonal selection. C. differentiation. D. proliferation. E. hypersensitivity.
Decompression sickness ("the bends") is caused by
a. a rapid rise of carbon dioxide in the blood. b. lack of oxygen in the tissues. c. bubbles of nitrogen in the blood. d. glucose deficiency. e. descending too rapidly into deep water.
A possible trigger for pneumonia is influenza, which is caused by ________ .
a. a protozoan b. bacteria c. a carcinoma d. a virus e. particulate matter.
Cross-pollination occurs when pollen from an anther of one plant is transferred to the stigma of another plant of the same species.
a. true b. false