Which of the following represents a correct sequence of levels within the hierarchy of life?

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.

Ais a group of individuals of the same that exist together in the same place at the same time

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what