Biology, 07.09.2020 06:01 lauren21bunch
A team of scientists is studying the fossils in the cross-section of rock shown below. Between which two layer of fossils can secondary succession be observed?
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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 20:00
Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256
Answers: 1
A team of scientists is studying the fossils in the cross-section of rock shown below. Between which...
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