Why is a tendril able to coil around a support?
Answer and explanation
Correct answer: Due to unequal growth affected by touch
The governing concept is thigmotropism, a directional growth response to touch. When one side of a tendril contacts a support, growth on the contacted side is reduced or altered relative to the free side. This unequal growth produces bending and eventually coils the tendril around the support, so option A is correct. Plants do not use a brain, spinal cord, blood, or insulin-based animal response for this movement.
Frequently asked questions
What is the correct answer to this question?
Due to unequal growth affected by touch
Why is this the correct answer?
The governing concept is thigmotropism, a directional growth response to touch. When one side of a tendril contacts a support, growth on the contacted side is reduced or altered relative to the free side. This unequal growth produces bending and eventually coils the tendril around the support, so option A is correct. Plants do not use a brain, spinal cord, blood, or insulin-based animal response for this movement.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Control and Coordination. Topic: Plant hormones.
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