Question

Which of the following statements is/are correct?

• A. All green plants can prepare their own food
• B. Most animals are autotrophs.
• C. Carbon dioxide is not required for photosynthesis.
• D. Oxygen is liberated during photosynthesis

Answer 1

Answer: (A), (D)

Oxygen is liberated during photosynthesis

The correct options are A and D

Explanation of the correct option:

Option A:

1. All green plants are making their own food.
2. They use water and carbon dioxide for photosynthesis.
3. Plants prepare glucose as the output of photosynthesis.

Option D:

1. Photosynthesis is the process by which plants make their food.
2. The raw material used for photosynthesis is water, carbon dioxide, and sunlight.
3. They prepare glucose as a by-product along with oxygen.
4. Hence, photosynthesis generates oxygen.

Explanation of the incorrect option:

Option B:

1. Animals are depending upon plants for their food.
2. They are unable to make their own food.
3. They feed on plants as well as animals.
4. Hence, animals are called heterotrophs and plants are autotrophs.

Option C:

1. Carbon dioxide is one of the raw materials for photosynthesis.
2. It is used in light reactions.
3. Carbon dioxide produces glucose in photosynthesis.

Final answer: All green plants can prepare their own food and Oxygen is liberated during photosynthesis are correct statements.