Question detail
A student is interpreting potometer data gathered from a leafy shoot. Which statement best applies tracheal gas exchange in insects to AQA A-Level Biology exchange substances?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Exchange substances official content
Question
- A. In potometer data gathered from a leafy shoot, tracheal gas exchange in insects explains the observation because structure and gradients affect the rate or distance of exchange, so the answer must link the biological mechanism to transport efficiency.
- B. The safest answer is to name tracheal gas exchange in insects only and avoid explaining a mechanism.
- C. Exchange efficiency is unrelated to surface area, gradient, pathway length or transport structure in this example.
- D. The observation should be treated as a memorised definition rather than evidence for a biological process.
Answer
The correct answer is: In potometer data gathered from a leafy shoot, tracheal gas exchange in insects explains the observation because structure and gradients affect the rate or distance of exchange, so the answer must link the biological mechanism to transport efficiency.
Explanation
The correct option connects the approved objective, Explain gas exchange adaptations in insects., to a specific exchange or transport context. It explains why the structure or process changes exchange efficiency, rather than repeating the wording of the objective or giving a generic definition.
Common mistake
Gas exchange common mistake 1
Giving a vague answer instead of directly addressing: Explain gas exchange adaptations in insects..
Answer by clearly explaining how to explain gas exchange adaptations in insects..
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