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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 23:50
Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?
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Biology, 22.06.2019 01:30
Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity
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Biology, 22.06.2019 02:30
What is the correct trna sequence that would match the following mrna sequence.gcgaua
Answers: 1
Difference between plants and animal cell...
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