Explain using C. E.R (Claim, Evidence, Reasoning) Why there are no planets other than Earth that humans can live on

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.

This is the process of making a prediction based on the results of prior observations of similar events.

The combining form leuk/o means red true or false