This climate is always dry. Usually we think of these places being hot, but sometimes they are cold! A temperate
B desert
C tropical
D equatorial

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.

Talking listening and reacting non verbally are all part of communicating

What molecule does hemoglobin decay into over time