If the solution inside of a cell is 15% salt and the solution outside of the cell is 10% salt... a. will water enter or leave the cell?
b. will the cell shrivel, swell, or stay the same?
c. is the solution surrounding the cell isotonic, hypertonic, or hypotonic

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’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.