ASA ASSIGNMENT DUE AT 2:00 How do you find which element is the most common form (PLEASE HURRR)

Why is it important that human chromosomes have many origins of replication

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.

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?