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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 01:30
Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?
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Biology, 22.06.2019 03:00
Which of the following are the ingredients that go into the plant and are needed for photosynthesis? select all that apply. 1.) soil 2.) seeds 3.) carbon dioxide 4.) minerals 5.) glucose (sugar) 6.) water 7.) light energy (sunlight) 8.) oxygen 9.) air
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Biology, 22.06.2019 05:00
What best describes the dropping height of a ball that bounces back up to a height of 45 cm
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Mathematics, 18.12.2019 02:31
History, 18.12.2019 02:31
Mathematics, 18.12.2019 02:31
Computers and Technology, 18.12.2019 02:31