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Frequency is the term that describes the number of waves passing a point during a certain period of time, frequency is also measured in Hz (hertz).
Explanation:
Adaptations generally occur in order to increase the fitness and thus survival of organisms. By being able to adapt to the changing environment, organisms are better able to survive and reproduce. ... Many people are under the impression that species require thousands or even millions of years to adapt.
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The light ray bends toward the normal when entering water