Which tissue within a leaf has the most chloroplasts?

A) xylem
B) phloem
C) epidermis
D) spongy mesophyll
E) palisade mesophyll

Palisade Mesophyll

The layer of vertically elongated cells found in the leaves of plants, rich in chloroplasts, where most photosynthesis occurs.

Spongy Mesophyll

A layer of loosely arranged, irregularly shaped cells in the leaf, allowing for gas exchange and containing chloroplasts for photosynthesis.

Chloroplasts

Organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis, capturing light energy to produce ATP and reduce NADP to NADPH.