Question

The process by which green plants synthesize their own food:

• A. Transpiration
• B. Respiration
• C. Excretion
• D. Photosynthesis

Answer 1

The correct option is D

Photosynthesis

The correct option is D.

Explanation of the correct option:

1. It is the process by which autotrophs are able to synthesize their own food.
2. Plants use simple inorganic substances such as carbon dioxide, water and sunlight to produce complex organic substances such as glucose and starch.
3. It is termed photosynthesis because it can only occur in the presence of sunlight.
4. The chlorophyll pigment in plants helps in trapping the energy from the sun.
5. Glucose, oxygen and water are the products formed during photosynthesis.

Explanation of the incorrect options:

Option A:

Transpiration is the process by which water is lost in the form of water vapour from the aerial parts of the plants.

Option B:

Respiration is the process of breaking down glucose to produce ATPs.

Option C:

Excretion is the process of elimination of waste material from the body.

Final answer: The process by which green plants synthesize their own food is photosynthesis.