For each picture, select from the drop-down menu the main type of carbohydrate the food contains. monosaccharide
disaccharide
polysaccharide

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.

What is the following best defines climate?

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?