DENDROLOGY

Detailed explanation-1: -The correct answer is Chloroplast. The Chloroplast is the most common plastid found in all the photosynthetic cells it is not found in the root cells of a plant. The chloroplast is a structure within the cells of plants and green algae that is the site of photosynthesis.

Detailed explanation-2: -Trees make their own food through photosynthesis, using energy from sunlight, water (from the roots), and carbon dioxide (from the air) to create sugar that is used to fuel the rest of the tree. Water is carried from the roots to the leaves through xylem cells.

Detailed explanation-3: -∴ Starch synthesis is not a function of root.

Detailed explanation-4: -Absorption of photon, splitting of water and conversion of light energy into chemical energy are functions of chlorophyll during photosynthesis. Oxidation of carbohydrate is not a function of chlorophyll, Oxidation of carbohydrate (Glucose) occurs in mitochondria which results in production of energy (ATP).