Researchers testing new drugs usually give the drug to one group of people and give placebos, "sugar pills," to another group. The group receiving the placebo ________
A) is needed so that the test will be repeated enough times
B) is the control group
C) constitutes the experimental group
D) is a backup in case some of the people getting the drug drop out of the test
B
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Which is NOT a checkpoint in the cell cycle?
A. the transition from G1 to S phase B. the transition from G2 to M phase C. the transition from M phase to G1 D. the beginning of M phase E. All of these choices are checkpoints in the cell cycle.
Creative destruction refers to the withdrawal of ________ from declining areas and activities for use in new areas and activities
A) capital B) building materials C) culture D) political ideas E) culture and political ideas
Red blood cells transport both oxygen and carbon dioxide molecules.
a. true b. false
List the human body's three lines of defense against disease
What will be an ideal response?