Compare surface area to volume
A gas-exchange comparison in a Auckland physiology lesson shows a small organism has a higher surface-area-to-volume ratio than a large organism. Explain why this matters. Use the diagram labels, physiology pathway, feedback loop, or data values before answering. Enter the answer and choose the interpretation that best matches the biological evidence.
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Worked practice: biological evidence and answer
Use the labelled biological evidence first, then connect it to the final answer.