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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 06:30
Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?
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Biology, 22.06.2019 15:00
When fossil fuels are burned, carbon dioxide is released. how does this gas impact the environment?
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Biology, 22.06.2019 19:00
Describe the structure of amino acid, including what makes amino acids different from eachother
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