Select the best answers from the drop-down menus. The
nerves control the muscles in the arms, shoulders, and neck.
The
nerves control the muscles in the abdomen and chest.
The
nerves control the muscles in the lower back, legs, and feet.

Texas bluebonnet plants seen in this photo are an example of which ecological unit?

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.

The climate on the leeward side of a mountain differs from that on the windward side mostly in