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Which processes form igneous rocks? a. melting and cooling b. melting and pressure c. pressure and cooling d. heat and pressure
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The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.
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Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?
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What is the difference between a scientific hypotheses and a scientific theory?
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Which processes form igneous rocks? a. melting and cooling b. melting and pressure c. pressure and...
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