A plant root bends towards water but the stem bends towards light. Which conclusion is correct?
Answer and explanation
Correct answer: Plants give directional responses to different stimuli
The governing idea is tropic movement: plant parts show directional growth in response to external stimuli. A root growing toward water demonstrates positive hydrotropism, while a stem growing toward light demonstrates positive phototropism. These observations support option A, showing that different organs can respond directionally to different stimuli. B denies plant coordination, and C and D contradict the examples given.
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What is the correct answer to this question?
Plants give directional responses to different stimuli
Why is this the correct answer?
The governing idea is tropic movement: plant parts show directional growth in response to external stimuli. A root growing toward water demonstrates positive hydrotropism, while a stem growing toward light demonstrates positive phototropism. These observations support option A, showing that different organs can respond directionally to different stimuli. B denies plant coordination, and C and D contradict the examples given.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
