Question:
Some plants have solar-tracking mechanisms and such mechanisms of bending towards sunlight is referred to as
Some plants have solar-tracking mechanisms and such mechanisms of bending towards sunlight is referred to as
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Heliotropism = Solar tracking (e.g., Sunflower).
Phototropism = Bending towards light.
Gravitropism = Response to gravity.
Phototropism = Bending towards light.
Gravitropism = Response to gravity.
Updated On: Sep 1, 2026
- Gravitropism
- Heliotropism
- Photoperiodism
- Phototropism
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
This question tests knowledge of plant movements.
Step 2: Detailed Explanation:
Heliotropism is the solar-tracking mechanism where plants bend towards sunlight.
It is also called solar tracking.
Examples: Sunflower (Helianthus annuus) exhibits heliotropism.
Gravitropism (A): Response to gravity.
Photoperiodism (C): Response to day length (flowering).
Phototropism (D): Bending towards light (more general).
Heliotropism is a specific form of phototropism involving solar tracking.
Thus, heliotropism is the correct term.
Step 3: Final Answer:
Thus, solar-tracking is referred to as heliotropism, which corresponds to option (B).
[0.5cm]
This question tests knowledge of plant movements.
Step 2: Detailed Explanation:
Heliotropism is the solar-tracking mechanism where plants bend towards sunlight.
It is also called solar tracking.
Examples: Sunflower (Helianthus annuus) exhibits heliotropism.
Gravitropism (A): Response to gravity.
Photoperiodism (C): Response to day length (flowering).
Phototropism (D): Bending towards light (more general).
Heliotropism is a specific form of phototropism involving solar tracking.
Thus, heliotropism is the correct term.
Step 3: Final Answer:
Thus, solar-tracking is referred to as heliotropism, which corresponds to option (B).
[0.5cm]
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