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Biology, 21.06.2019 18:30
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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Biology, 21.06.2019 20:00
The process by which natural forces move weathered rock and soil brim one place to another is called
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Biology, 21.06.2019 23:30
What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a
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What is the backbone of dna made up of ?...
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