Why do tendrils of a climber bend after touching support?
Answer and explanation
Correct answer: Due to a growth response to touch
A tendril shows thigmotropism, which is a directional growth response to touch. After contacting a support, growth becomes faster on the side away from the contact and slower on the touched side. This unequal growth causes the tendril to curve and wrap around the support. Blood flow, heartbeat, and stopped respiration do not explain this plant movement, so option A is correct.
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What is the correct answer to this question?
Due to a growth response to touch
Why is this the correct answer?
A tendril shows thigmotropism, which is a directional growth response to touch. After contacting a support, growth becomes faster on the side away from the contact and slower on the touched side. This unequal growth causes the tendril to curve and wrap around the support. Blood flow, heartbeat, and stopped respiration do not explain this plant movement, so option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
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