Question
A student investigated photosynthesis in pondweed by counting the gas bubbles released from a cut stem. At 25 °C the student counted 78 bubbles during a 3 minute period.
[2 marks]
Calculation
Type your answer
Include the unit where there is one (e.g. a magnification ×100, or a rate in cm³/min).
Modelled on Cambridge 0610 · Oct/Nov 2025 · Paper 63 · Q2(b)(i)
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Modelled on Cambridge 0610 · Oct/Nov 2025 · Paper 63 · Q2(b)(i)