2023 Solved Old Paper (BOT - 204) New
Ans. Osmotic potential:- > It is the potential of water molecules to move from a hypotonic solution to a hypertonic solution across a semi-permeable membrane. > The value of the osmotic potential can be determined using the Van't Hoff equation. > The water potential of pure water is zero by convention. > It is zero because there are no dissolved salts. Ans. Transpiration is Necessary Evil:- Transpiration and photosynthesis occur simultaneously due to the opening of stomata. - However, transpiration also causes loss of water unnecessarily. Due to the process of transpiration, there is pressure on the plant for the absorption of water. Therefore, the process of transpiration is called a necessary evil. Ans. Donnan Equilibrium Theory:- The membrane is selectively permeable in nature. Some are permeable to ions and some are impermeable. The ions for which the membrane is permeable enter the cell by diffusion. This disturbs the equilibrium. To re-e...