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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.
Answers: 2
Biology, 22.06.2019 03:00
The diagram shows the layers of earth. convection currents in which region influence the movement of tectonic plates
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Biology, 22.06.2019 19:00
How secretion and excretion both are different? explain in simple language.
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Biology, 23.06.2019 01:00
Afossil of a sable antelope with his i was observed in the topmost layer of soil a fossil of a zebra was found in low at the bottom layer contains fossils of a blue in this discovery tells us that what
Answers: 3
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