What does the genetic analyzer do? _

Scientific thinking: what clues about biology might road kill provide?

Where would you most likely not find an alpine glacier? the himalayas the rockies the andes flat areas of antarctica

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.