DENDROLOGY

Detailed explanation-1: -There are two types of mesophyll cells in the leaves namely palisade mesophyll and spongy mesophyll. Mesophyll cells are provided with a large number of chloroplast. Photosynthesis occurs in the chloroplast.

Detailed explanation-2: -A major role of leaf mesophyll cells is to contain large populations of chloroplasts, which carry out photosynthetic carbon assimilation facilitating plant growth.

Detailed explanation-3: -Palisade cells contain the largest number of chloroplasts per cell, which makes them the primary site of photosynthesis in the leaves of those plants that contain them, maximizing the production of energy, converting the energy in light to the chemical energy of carbohydrates.