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Why are scientists concerned about the depletion of the ozone levels in the stratosphere?
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Nitrogen-14 and nitrogen-15 are isotopes of the same element. how do these two isotopes differ? a. they have different numbers of nuclei. b. they have different numbers of protons. c. they have different numbers of neutrons. d. they have different numbers of electrons.
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Explain how this example of pesticide resisitance in ticks is an example of biological evolution
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What typc of molecule is shown in the diagram?
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