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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, 21.06.2019 19:30
Select the correct answer. in the image, if the washcloth represents consumed food, which organ of the digestive system correctly represents the action performed by the hands? hands squeezing water from a washcloth a. esophagus b. large intestine c. liver d. mouth
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Biology, 21.06.2019 20:00
Why do carbohydrate molecules function so well as fuel for the body?
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Biology, 22.06.2019 09:40
Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.
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Which fossils do invertebrate paleontologists study?...
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