The diagram magnifies a cross section of the plasma membrane What main role does the plasma mernbrane have in cellular activity?
It allows the cell to control what materials enter and leave.
O It contains genetic material that is important for cell reproduction
It regulates the production of energy in the cell.
It serves as a source of lipids and proteins for the cell.

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 represents a negative impact of technology

According to your text, should be in the native language of the parents or guardians whenever possible. a. an email b. consent forms c. oral approval d. storybooks loaned out