Question

The movement of sunflower in accordance with the path of sun is due to

• A. phototropism
• B. geotropism
• C. chemotropism
• D. hydrotropism

Answer 1

The correct option is A

phototropism

The correct option is A.

Explanation for correct option:

• The movement of a sunflower occurs according to the direction of sunlight. This type of growth movement is called phototropism.
• The growth increases in the shoots of the sunflower that is away from sunlight, causing the plant to bend towards the sun's direction.

Explanation for incorrect options:

Option B:

• The growth movement occurring towards light is phototropism, not geotropism. In geotropism, the growing movement occurs due to gravitational pull.

Option C:

• Chemotropism occurs due to the presence of a chemical stimulus, while a sunflower shows growth according to the direction of sunlight.

Option D:

• The growth in a sunflower does not occur in accordance with water; hence the growing movement in a sunflower is not called hydrotropism.

Final Answer: Therefore, the movement of a sunflower according to the path of the sun is due to phototropism.