Question

Which of the following are correct with respect to autotrophic nutrition in plants?

• A. Stomata in leaves help in the uptake of CO₂.
• B. Sunlight and chlorophyll are essential for photosynthesis
• C. Light energy is converted into mechanical energy.
• D. Water and mineral salts are absorbed by the roots.

Answer 1

Answer: (A), (B), (D)

Water and mineral salts are absorbed by the roots.

• Plants can produce their own food through the process of photosynthesis. During this process they convert light energy into chemical energy.
• Leaves of the plants have openings called stomata which help in exchange of gases i.e taking in CO₂ and releasing oxygen that is a by product of photosynthesis.
• Water and minerals are absorbed from the soil by the roots of the plant.
• They utilise this CO₂ and water in the presence of sunlight and chlorophyll to produce glucose.