Main function of leaf is -a)Manufacture of foodb)Exchange of gasesc)Both (1) and (2)d)None of the aboveCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Leaves are appendages present in green plants.
They contain a pigment called chlorophyll which is necessary for photosynthesis. This photosynthetic reaction takes place in the leaves and results in the production of carbohydrates (food).
The lower surface of leaves has many small openings known as stomata. These pores help the plant in the exchange of gasses with their surroundings.
Therefore it can be inferred that both the manufacture of food and exchange of gasses takes place through leaves.

Answer

Leaves contain chlorophyll which is necessary for photosynthesis. This photosynthetic reaction takes place in the leaves and result in the production of carbohydrates (food).
The lower surface of leaves has many small openings known as stomata. These pores help the plant in the exchange of gases with their surrounding.
Therefore, option 'C' is the correct answer.

Answer

Main function of leaf is both (1) Manufacture of food and (2) Exchange of gases.

Manufacture of food:
- Leaves are the primary site of photosynthesis in plants, where they convert sunlight, carbon dioxide, and water into glucose (a form of sugar) and oxygen.
- Photosynthesis is the process by which plants use sunlight energy to synthesize carbohydrates, primarily glucose, which serves as the main source of energy for the plant.
- Chloroplasts, which contain the pigment chlorophyll, are responsible for capturing sunlight and carrying out photosynthesis within the cells of the leaf.
- The green color of leaves is due to the presence of chlorophyll, which is essential for photosynthesis.
- The glucose produced during photosynthesis is stored as starch in the leaf or transported to other parts of the plant for energy storage and growth.

Exchange of gases:
- Leaves also play a crucial role in the exchange of gases, specifically the uptake of carbon dioxide (CO2) and release of oxygen (O2) during photosynthesis.
- Carbon dioxide enters the leaf through tiny pores called stomata, which are mainly located on the lower surface of the leaf.
- Oxygen, a byproduct of photosynthesis, is released into the atmosphere through the stomata.
- The exchange of gases is essential for the plant's respiration and the removal of excess oxygen produced during photosynthesis.

Other functions of leaves:
- Leaves also help in the regulation of water loss through transpiration. The stomata control the opening and closing of pores, thus regulating the movement of water vapor and preventing excessive water loss.
- Leaves may also have specialized structures like tendrils, spines, or modified leaves called bracts, which serve various functions such as climbing, protection, or attracting pollinators.
- Leaves can also act as a storage site for water and nutrients in certain plants.

Therefore, the main functions of leaves are the manufacture of food through photosynthesis and the exchange of gases, primarily carbon dioxide uptake and oxygen release.

Answer

Because leaf has chlorophyll which helps in photosynthesis i.e.food making process and it also have stomata which do exchange of gases

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