Bone becomes moist when kept in dilute hydrochloric acid, why?

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.

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

What element does susan b. anthony include in this passage to strengthen her argument?