Horses, zebras, and donkeys are all different species. they are believed to have come from one common ancestor and just become more and more different due to their different environmental conditions. these animals may have evolved by

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.

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Which process is represented a.) deletion b.) nondisjunction c.) translocation d.) insertion