Biology, 21.06.2019 18:30, narutoxptheninja
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 16:00, english8971
Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?
Answers: 2
Biology, 21.06.2019 17:00, ccarwile01
Which of the following is not a characteristic of carnosaurs? a. long narrow skulls b. strong forelimbs c. horn projecting from their skulls d. none of the above
Answers: 1
Biology, 21.06.2019 18:40, BLESSEDKIDD1998
The study of interaction between living organisms and their enviroment is called (a) phytogeography (b) ecology (c) phytosociology (d) ecosystem
Answers: 3
The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-sahar...
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