Biology for IGCSE & O level - Plant Nutrition (Section 1 - No. 23)
What is the role of the spongy mesophyll layer in the leaf?
To provide the main structure of the leaf
To store the excess water that enters the leaf
To protect the leaf from external dangers
To allow gas exchange through the air spaces
Explanation
Spongy mesophylls have air spaces to facilitate gas exchange.
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