what are you supposed to do if your teacher looses your paper and you know you turned it in but it says in the grade book missing

Which technically is nasa developing that will astronauts reach mars

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.

Can someone give me the answers to this?