Explain how both nucleic acids and proteins are polymers

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.

Which process can increase the rate of greenhouse gas emissions into the atmosphere in response to a decrease in albedo

What is turgor pressure, what causes it, and what does it do for a plant?