3 Identify X, Y, and Z. Name the THREE processes occurring at Z. Explain how epidermal tissue is suited for maximum light absorption.

Here are the answers to question 1.3:

Question 1.3

1.3.1 Identify:

• a) X: Subsidiary cell (or accessory cell)
• b) Y: Guard cell
• c) Z: Stomatal pore

1.3.2 Name the THREE processes occurring at Z.

The stomatal pore (Z) is the site for:

• Photosynthesis (specifically, the intake of carbon dioxide and release of oxygen)
• Respiration (specifically, the intake of oxygen and release of carbon dioxide)
• Transpiration (the release of water vapor)

1.3.3 Explain ONE way in which the epidermal tissue of a leaf is suited for maximum absorption of light.

• The epidermal tissue (especially the upper epidermis) is typically transparent and lacks chloroplasts. This allows sunlight to pass through unimpeded, ensuring that the maximum amount of light reaches the photosynthetic cells (palisade mesophyll) located beneath the epidermis.