AP BIOLOGY

Detailed explanation-1: -But it does not get burst due to the presence of cell wall. Cell wall can withstand dilute hypotonic media and prevents bursting of cells. Therefore, plant cells withstand changes in environmental concentration much better than animal cells which get burst in such conditions.

Detailed explanation-2: -Red blood cells placed in a solution with a higher water concentration compared to their contents (eg pure water) will gain water by osmosis, swell up and burst. Water will diffuse from a higher water concentration outside the cell to a lower water concentration inside the cell.

Detailed explanation-3: -So, the correct answer is ‘Cells wall is rigid and does not get overstretched’

Detailed explanation-4: -An animal cell contains cytoplasm which has many nutrients and dissolved mineral. Therefore this solution becomes hypertonic to the surrounding water where no minerals or salts are present. Thus outside water is hypotonic to the cytoplasm of the cell. As a result, water moves inside the cell and the cell bursts.

Detailed explanation-5: -If a red blood cell is placed in water, water enters the cell by osmosis. Because the membrane is quite weak the cell will burst as the volume and therefore the pressure in the cellincreases. Red blood cells shrink whenplaced in concentrated solutions of sugar as water moves out of them by osmosis.