NEET BIOLOGY

Detailed explanation-1: -When there is a higher concentration of potassium ions in the surrounding soil than in the root hair cells, these ions can move into the root hair cells passively, without using an input of energy. This passive movement, from a high to low concentration, is called diffusion.

Detailed explanation-2: -Ion absorption by plant roots is determined by both root physiology and the mobility of ions in the soil itself and within the soil solution. The nature of the movement of these ions in the soil and soil solution affects plant growth, crop yield, and product quality. cations, potassium (K+) and magnesium (Mg2+).

Detailed explanation-3: -Active transport – Higher tier only Minerals cannot be absorbed by osmosis because this is the movement of water only. They cannot be absorbed by diffusion, because the minerals are in very low concentration. Instead, active transport is used. The root hair cells have carrier proteins in their cell membranes.

Detailed explanation-4: -Active transport in plants For plants to take up mineral ions, ions are moved into root hairs, where they are in a higher concentration than in the dilute solutions in the soil. Active transport then occurs across the root so that the plant takes in the ions it needs from the soil around it.

Detailed explanation-5: -Mineral ions in the soil move to roots via fungal hyphae (mutualism), mass flow of water in the soil carrying ions and the diffusion of mineral ions.