Question

Explain why guard cells have thicker inner walls and thinner outer walls​

Answer 1

Guard cells have thicker inner walls to support changing shape for stomata opening and thinner outer walls to minimize water loss, aiding in regulating gas exchange and managing water balance in plants.

Step-by-step explanation:

Guard cells are specialized cells in the epidermis of plant leaves that control the opening and closing of stomata to regulate gas exchange and water loss. These cells have thicker inner walls and thinner outer walls, which are structurally adapted for their function.

Conversely, when solute concentration decreases within the guard cells, water leaves, and the loss of pressure causes the cells to become flaccid and the stomata to close, minimizing water loss. This unique wall structure supports the cell's ability to alter shape and manage the entry and exit of gases and water vapor, contributing to the overall water balance and functioning within the plant.

Answer 2

The inner walls of the guard cells are thick to facilitate the opening of stomatal pore during transpiration. When water enters, outer walls expand which cause the inner walls to draw out causing opening of stomata.