I NEED 7 AND 8 PLEASE HELPPP IM GIVING OUT BRAINLIEST AND IF YOU DO THIS QUESTION AND MY OTHER ONES ILL GIVE YOU BRAINLIEST AND GIVE OUT 17 POINTS THANKSSS:)

Analogy- 1 is to arete as 5 is to cirque horn glacial valley hanging valley

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.

What feature of cell theory is best demonstrated in the image