The stem grows towards light but the root usually grows away from light. What does this show?
Answer and explanation
Correct answer: Different organs can respond differently to the same stimulus
The governing concept is organ-specific tropic response. Light is the same stimulus, but the stem generally shows positive phototropism by growing toward it, whereas the root commonly shows negative phototropism by growing away. Different organs have different structures, hormone distribution and growth responses, so their reactions need not be identical. This disproves the other choices; therefore option A is correct.
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What is the correct answer to this question?
Different organs can respond differently to the same stimulus
Why is this the correct answer?
The governing concept is organ-specific tropic response. Light is the same stimulus, but the stem generally shows positive phototropism by growing toward it, whereas the root commonly shows negative phototropism by growing away. Different organs have different structures, hormone distribution and growth responses, so their reactions need not be identical. This disproves the other choices; therefore 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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