It is either carcinogens or viruses (I think the first) I hope this helps!
One reason is for safety! in case you get stranded in a body of water you can keep yourself afloat
Pressure exerted by fluid in a cell that presses the cell membrane against the cell wall. Turgor is what makes living plant tissue rigid. Loss of turgor, resulting from the loss of water from plant cells, causes flowers and leaves to wilt.
