Ais a piece of information that is communicated through using senses
A. Wave
B. Notification
C. Circuit
D. Signal

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.

If 360 joules of work are needed to move and create a distance of 4 m what is the weight of the crate

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen