Question

the openings in the epidermis of a leaf that allow the movement of co₂ and o₂ into or out of the leaf are called

○ stomata
○ grana
○ photosystems
○ follicles

Explanation:

To solve this, we analyze each option:

• Stomata: These are small openings on the leaf epidermis that regulate gas exchange (allowing \( \text{CO}_2 \) in and \( \text{O}_2 \) out, and vice versa) and transpiration.
• Grana: These are stacks of thylakoids in chloroplasts, involved in photosynthesis, not gas exchange openings.
• Photosystems: These are complexes in chloroplasts that capture light energy for photosynthesis, not related to gas exchange openings.
• Follicles: These are structures in the body (e.g., hair follicles, ovarian follicles) and not related to leaf anatomy.

So the correct option is the one related to leaf gas exchange openings.

Answer:

A. stomata