Question

Carbon dioxide is essential for the process of:

• A. Conduction
  
• B. Transpiration
• C. Absorption
• D. Photosynthesis

Answer 1

The correct option is D

Photosynthesis

The correct option is D.
Explanation of the correct option:

1. Photosynthesis is the process by which green plants make their own food with the help of carbon dioxide, water in the presence of sunlight and chlorophyll.
2. During the process of photosynthesis, leaves give out oxygen that supports different life forms on the earth.

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂.
(carbon dioxide) (water) (glucose) (oxygen)

Explanation of the incorrect option:

Option A:

1. Conduction is a biological process in which water and minerals are transported to different parts of the plant body such as roots, stems, leaves etc.

Option B:

1. The process of loss of water by the process of evaporation from the upper surface of leaves through stomata is known as transpiration.
2. During this process, water vapour is released and carbon dioxide is absorbed by the leaves.

Option C:

1. Absorption is a biological process in which plants absorb water and dissolved minerals from the soil with the help of their roots.

Final answer:

Carbon dioxide is essential for the process of photosynthesis.