When you destroy a part of the brain to see what function that area had, what method is this?.

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 noticeable trend from this graph might be used to make a conclusion?

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.