Question

When kept in water raisin swells in size, name and explain the phenomena involved with the help of a diagram given three application of the phenomenon

Answer 1

Answer:

This phenomena is known as osmosis. it is movement of water molecules from higher water potential to lower water potential through a partially permeable membrane (cell surface membrane).

When the raisin is kept into water the cells have lower water potential than outside. The water which is outside will enter through the cell surface membrane into the vacoule of the cell. this will cause the vacoule to swell. Eventually all the cells will swell and become turgid (hard).

This phenomena is used for preserving food like fruits or meat. The turgidity in the plant cell will help the plant to stand straight.