BI-820
Leaf structure
Biology · Secondary 3 · Medium · Leaf structure
A student compares the internal structure of a leaf and notes a layer of tall, closely packed cells rich in chloroplasts just below the upper epidermis. What is the main function of this layer?
- To reduce water loss by secreting a waxy cuticle
- To transport water and mineral salts through the leaf
- To carry out most of the photosynthesis in the leaf
- To allow gases to diffuse in and out of the leaf
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