All questions of Plant Life for Class 6 Exam

What process do leaves use to exchange gases?
a)
Photosynthesis
b)
Stomatal exchange
c)
Respiration
d)
Transpiration
Correct answer is option 'B'. Can you explain this answer?

Nclex Coaching Centre answered

Leaves exchange gases primarily through a process called stomatal exchange. This involves small openings on the leaf surface known as stomata. Here’s how it works:

Stomata open to allow carbon dioxide (CO₂) to enter the leaf for photosynthesis.
Oxygen, a by-product of photosynthesis, exits the leaf through the same stomata.
Water vapour also leaves the leaf during this process, which is part of transpiration.
The opening and closing of stomata are controlled by guard cells, which respond to environmental conditions.

This gas exchange is vital for the plant’s ability to produce energy and maintain its health.

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