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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 22:40
Which sequence correctly shows the path of carbon dioxide during repiration?
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Biology, 22.06.2019 06:00
Why does bubbling occur when vinegar mixed with baking soda
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Biology, 22.06.2019 07:30
How does secondary succession differ from primary succession?
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Mathematics, 26.06.2019 10:30
Spanish, 26.06.2019 10:30
English, 26.06.2019 10:30
Mathematics, 26.06.2019 10:30