In an experiment to determine the effect of exercise on pulse rate, a student checks his pulse rate before
and after exercising for several minutes. the purpose of checking his pulse rate before exercising is that it
(1) serves as the conclusion for the experiment
(2) is needed to justify the sample size
(3) serves as a control for the experiment
(4) is needed to formulate a hypothesis
Answers: 1
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Cells tend to have a relatively small and uniform size. why aren’t cells larger?
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Someone me with this: a mineral' is determined by its actomic structure.
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