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Kendra serves on a committee whose job is to review proposed psychology studies. The committee refuses to approve one study because they feel the possible benefit from the research is too little given the potential risk to the participants. Kendra's committee is most accurately called an _________________.
Evolution
The method through which various types of life are believed to have evolved and branched out from ancestral forms throughout Earth's history.
Radioisotopes
Unstable isotopes that spontaneously emit radiation; also called radioactive isotopes.
Half-Life
The time required for half the atoms of a radioactive substance to decay or for a drug or other substance to lose half its pharmacologic, physiologic, or radiologic activity.
Potassium-40
A radioactive isotope of potassium used in dating geological materials, as it decays into argon-40 over a known period of time.
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