The autotrophic mode of nutrition requires
  1. carbon dioxide and water.
  2. sunlight.
  3. chlorophyll.
  4. all of the above.

AcademicBiologyNCERTClass 10

Correct Answer: (d) All the above

Explanation: The mode of nutrition in which organisms make their own food by the process of photosynthesis is known as the autotrophic mode of nutrition. Photosynthesis is the process by which green plants make their own food using raw materials like sunlight, chlorophyll, water, and carbon dioxide.

Photosynthesis is a process by which plants make their own food in the presence of sunlight, carbon dioxide, water, minerals, and chlorophyll present in leaves.

1) Plants take up carbon dioxide from the atmosphere through the tiny pores known as stomata present on the surface of the leaves.
2) Plants absorb the water and minerals from the soil with the help of roots and transport them to the leaves of the plant, where the synthesis of food takes place.
3) The green pigment, chlorophyll, present in plant leaves, helps the leaves to capture sunlight. Sunlight is the source of energy to carry out photosynthesis.
4) In the presence of sunlight, chlorophyll acts on carbon dioxide, minerals, and water to produce carbohydrates. These carbohydrates are stored in the plant's leaves in the form of energy.
5) The process of photosynthesis also releases oxygen into the atmosphere.

Updated on 10-Oct-2022 13:19:00