Pls help me and NO LINKSS

its for biology

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

4. if a cell is placed inside a solution that has a higher concentration of solute than on the inside of the cell, what can be said about the movement of water? a. water will move out of the cell, causing it to shrivel. b. water will move in and out of the cell at the same rate. c. water will move out of the cell, causing it to swell. d. water will move into the cell, causing it to swell.