When a pollen grain reaches the stigma of a plant the plant has been?

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 fossil organism in whale evolution do you think was the first to live mostly in water? explain your claim with evidence and reasoning?

What nerve is affected in bell palsy