Why is phototropism in plants called a growth based response?
Answer and explanation
Correct answer: Because bending occurs due to greater growth of cells on one side of stem
Phototropism is a directional growth response to light. In a shoot receiving light from one side, auxin is redistributed and usually promotes greater cell elongation on the shaded side. That side grows faster, so the shoot bends toward the light. The plant does not move by muscles or run, and leaves do not pump blood. Thus option A correctly identifies unequal growth as the cause.
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What is the correct answer to this question?
Because bending occurs due to greater growth of cells on one side of stem
Why is this the correct answer?
Phototropism is a directional growth response to light. In a shoot receiving light from one side, auxin is redistributed and usually promotes greater cell elongation on the shaded side. That side grows faster, so the shoot bends toward the light. The plant does not move by muscles or run, and leaves do not pump blood. Thus option A correctly identifies unequal growth as the cause.
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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