Question detail
How does auxin affect shoot growth compared to root growth?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Plant hormones (biology only)
Question
- A. Auxin promotes more growth in roots than in shoots.
- B. Auxin promotes more growth in shoots than in roots.
- C. Auxin has the same effect on both shoots and roots.
- D. Auxin does not affect growth.
Answer
The correct option is Auxin promotes more growth in shoots than in roots.. This answer is correct because it matches the approved learning objective to explain how unequal distribution of auxin causes unequal growth in shoots and roots in the subtopic Control and coordination.
Explanation
The correct option is Auxin promotes more growth in shoots than in roots.. Auxin promotes more growth in shoots than in roots. is correct because it directly supports the approved learning objective to explain how unequal distribution of auxin causes unequal growth in shoots and roots. This belongs to the subtopic Control and coordination within Plant hormones (biology only), so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Control and coordination.
Common mistake
Misunderstanding Auxin Distribution
Students often think that auxin is only concentrated on one side of the plant, leading to confusion about how it affects growth in both shoots and roots.
Clarify that auxin is distributed unevenly in response to light and gravity, causing differential growth rates that result in bending towards light (phototropism) or away from gravity (gravitropism).
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