What can you do to help prevent and relieve muscle cramps? 1. Drink water and take deep breaths.

2. Wrap the muscles tightly and keep the area moist.

3. Keep the area exposed to air and add warmth.

4. There's no real way to prevent or relieve muscle cramps.

Which process is involved in growing crops? irrigation transportation recreation condensation

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.

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.