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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, 22.06.2019 00:30
Name the types of burns one can get and which structures of the integument are damaged
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Biology, 22.06.2019 09:30
Along what geographical feature are most of the oil producing regions located
Answers: 1
Why do scientists make biological collections...
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