Which aspect of the scientific method occurs first?

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.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12