AP BIOLOGY

Detailed explanation-1: -“Salt essentially draws the water out of their skin – an osmosis effect – and they die within minutes of dehydration, ” says Dr Gordon Port, senior lecturer at Newcastle University. “Slugs and snails are extremely dependent on a high water content in their bodies. They constantly need water to replenish any the lose.

Detailed explanation-2: -Furthermore, osmosis requires a semi-permeable membrane, while diffusion does not. The intake of water in plants is an example of osmosis. Diffusion is observed when a drop of food colouring is added to a glass of water, where eventually, the entire water content becomes coloured.

Detailed explanation-3: -For example, water and sugar would be characterized as a sugar solution. The classic example used to demonstrate osmosis and osmotic pressure is to immerse red blood cells into sugar solutions of various concentrations.

Detailed explanation-4: -In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.

Detailed explanation-5: -A phenomenon called endosmosis takes place when raisins are placed in water for few hours. When raisins are soaked in water, they swell. All this is due to the process of osmosis. The water molecules pass the cell membrane of the raisins and the raisins thus get swollen.