NEET BIOLOGY

Detailed explanation-1: -The air in case of stem diffuses into the stomata and moves through different parts of the cell to respire. During this stage, the carbon dioxide liberated is also diffused through the stomata. Lenticels are known to perform gaseous exchange in woody or higher plants.

Detailed explanation-2: -Lenticels are loosely packed dead cells that allow gaseous exchange in plants. They are present in a small area in the bark. Lenticels allow oxygen to pass to the intracellular spaces and carbon dioxide is liberated, therefore completing the process of respiration.

Detailed explanation-3: -The lenticels found on the epidermis of different plant organs (stem, petiole, fruits) made up of parenchymatous cells are pores that always remain open, in contrast to stomata, which regulate their extent of opening. Lenticels are visible on fruit surfaces, such as mango, apple, and avocado.

Detailed explanation-4: -A lenticel is a porous tissue made up of vast intercellular gaps between cells. On stems and roots, lenticels appear as elevated circular, oval, or elongated patches. Lenticels allow gases to pass between the atmosphere and the organs’ interior tissues.

Detailed explanation-5: -Respiration in Stem To breathe, the air in a stem diffuses into the stomata and travels through various regions of the cell. The released carbon dioxide is distributed through the stomata at this time. In higher or woodier plants, lenticels are known to perform the gaseous exchange.