The Palisade layer is a row of cells in the upper region of a leaf that contains many chloroplasts. Which leaf layer is this?

The Palisade layer is a row of cells in the upper region of a leaf that contains many chloroplasts. Which leaf layer is this?

• A. Palisade layer
• B. Cuticle
• C. Spongy mesophyll
• D. Epidermis

Answer: (A)

This is about the leaf layer specialized for light capture and photosynthesis, located just below the upper surface. The palisade mesophyll consists of tall, tightly packed cells that are rich in chloroplasts, maximizing the leaf’s ability to absorb light and drive photosynthesis. That dense, chloroplast-rich layer is precisely why this region is described as having many chloroplasts. In comparison, the cuticle is the waxy outer coating that helps prevent water loss, not a photosynthetic tissue; the epidermis is the outer protective layer; and the spongy mesophyll is beneath the palisade layer, featuring air spaces to aid gas exchange and cells that are less densely packed with chloroplasts. So the described upper, chloroplast-rich layer is the palisade layer.

This is about the leaf layer specialized for light capture and photosynthesis, located just below the upper surface. The palisade mesophyll consists of tall, tightly packed cells that are rich in chloroplasts, maximizing the leaf’s ability to absorb light and drive photosynthesis. That dense, chloroplast-rich layer is precisely why this region is described as having many chloroplasts.

In comparison, the cuticle is the waxy outer coating that helps prevent water loss, not a photosynthetic tissue; the epidermis is the outer protective layer; and the spongy mesophyll is beneath the palisade layer, featuring air spaces to aid gas exchange and cells that are less densely packed with chloroplasts. So the described upper, chloroplast-rich layer is the palisade layer.