NEET BIOLOGY

Detailed explanation-1: -cell structure of plants … inner walls are lined with suberin, a fatty substance that is highly impermeable to gases and water (which is why cork is used to stop wine bottles).

Detailed explanation-2: -Cutin is impermeable to water, so it prevents excess loss of water, thereby maintaining the plant’s shape. It also increases the effectiveness of this physical barrier by thickening the cell walls. Some plants have a cork layer surrounding organs, such as the stem.

Detailed explanation-3: -Lignin, suberin, and cutin are complex polymers that occur in cell walls of some specific type of cell. These are present in very small amount in food plants but have significant role in protection against colorectal cancer [100].

Detailed explanation-4: -The permeability of suberin to water and solutes was found to be mostly determined by the aliphatic domain of suberin (Hose et al., 2001). In P. australis and G.