Question detail
What is a common application of auxins in agriculture?
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. Increasing the size of fruits
- B. Controlling the ripening of fruits
- C. Acting as a selective herbicide
- D. Promoting seed dormancy
Answer
The correct option is Acting as a selective herbicide. This answer is correct because it matches the approved learning objective to describe (HT only) the use of auxins as selective weed killers in the subtopic Use of plant hormones (HT only).
Explanation
The correct option is Acting as a selective herbicide. Acting as a selective herbicide is correct because it directly supports the approved learning objective to describe (HT only) the use of auxins as selective weed killers. This belongs to the subtopic Use of plant hormones (HT only) 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 Use of plant hormones (HT only).
Common mistake
Misunderstanding the Mechanism of Action
Students often confuse the action of auxins as selective weed killers with their role in promoting growth in all plants, failing to recognize that auxins target specific plants.
Students should focus on understanding that auxins disrupt the growth patterns of broadleaf weeds while not affecting grasses, emphasizing the selective nature of auxins in weed control.
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