Question

Which of the following statements is/are correct?

1. All green plants can prepare their own food.
2. Most animals are autotrophs.
3. Carbon dioxide is not required for photosynthesis.
4. Oxygen is liberated during photosynthesis.

Choose the correct answer from the options below:

विकल्प

• (i) and (iv)

• (ii) only

• (ii) and (iii)

• (i) and (ii)

Answer 1

(i) and (iv)

Explanation:

Animals cannot manufacture their own food so they are heterotrophs, not autotrophs.

Carbon dioxide is a raw material for photosynthesis. In the process of photosynthesis, plants manufacture organic compounds, inside the chlorophyll-containing cells from carbon dioxide and water with the help of solar energy. So, CO₂ is essential for photosynthesis.