AP BIOLOGY

Detailed explanation-1: –A salt-water snail is mistakenly put into a freshwater tank. The salt concentration is higher within the snail than in the tank, so water will travel from the tank into the snail to equal the salt concentration. The snail will swell and may possibly die.

Detailed explanation-2: -When animal cells are put in salty water, water diffuses/moves out of the cell and the cell shrivels up. When plant cells are put in fresh water, water diffuses/moves into the cell and fills up the central vacuole.

Detailed explanation-3: -When placing a saltwater plant into a container of freshwater, the cells are thus introduced to a hypotonic environment, i.e. the concentration of solute is lower in the external medium than within the cell’s cytosol.

Detailed explanation-4: -Salt Sucks, Cells Swell If a higher concentration of salt is placed outside of the cell membrane, the water will leave the cell to bond with it. The loss of water from this movement causes plant cells to shrink and wilt. This is why salt can kill plants; it leaches the water from the cells.

Detailed explanation-5: -The cell swells up when endosmosis occurs. Endosmosis is when the water molecules move from the outside to the inside of the cell through the cell membrane.