After removing the tip of a plant bending towards light, bending decreased. What conclusion follows?
Answer and explanation
Correct answer: The tip is important in auxin-related light response
The shoot tip is an important site for production and distribution of auxin, a plant hormone involved in growth. In phototropism, light causes unequal auxin distribution, so cells on the shaded side elongate more and the shoot bends towards light. If removing the tip reduces bending, the experiment supports the conclusion that the tip contributes to auxin-mediated phototropic response. The other options are unrelated biological claims.
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What is the correct answer to this question?
The tip is important in auxin-related light response
Why is this the correct answer?
The shoot tip is an important site for production and distribution of auxin, a plant hormone involved in growth. In phototropism, light causes unequal auxin distribution, so cells on the shaded side elongate more and the shoot bends towards light. If removing the tip reduces bending, the experiment supports the conclusion that the tip contributes to auxin-mediated phototropic response. The other options are unrelated biological claims.
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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