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Question

The process by which green plants make their own food by utilizing CO2 and water in the presence of sunlight is called__________.

A

Respiration

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B

Photosynthesis

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C

Excretion

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D

Diffusion

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Solution

The correct option is (D):

Explanation of the correct option:

  1. ​The green plants produces food in the form of glucose by utilizing carbon dioxide and water in the presence of solar energy.
  2. The green pigment called chlorophyll can trap the solar energy which is used to perform photosynthesis, that finally produces food in plants.
  3. The glucose is produced in the leaves of the plants where chlorophyll is present.

Explanation of the incorrect options:​

Option (A):

  1. Diffusion in the plant occurs during gaseous exchange.
  2. The gaseous exchange occurs between the plant and the atmosphere ​for entry of carbon dioxide and exit of oxygen.

Option (B):

  1. Respiration is the process of breaking down of glucose.
  2. This occurs inside the cell producing the energy in the form of ATP.

Option (C):

  1. ​Excretion is the process of removal of excretory residues that needs to be removed from the system.

Final Answer: The process by which green plants make their own food by utilizing CO2 and water in the presence of sunlight is called photosynthesis.


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