Please help due now in psychology

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.

Look at the images of different rocks. which rocks have a fine-grained texture? check all that apply. 1 2 3 4 5

Which type of stimulus do mechanoreceptors detect? sound pain heat light