Question
CCEA Double Award Practical Paper (Higher)
A student wants to investigate the effect of light intensity on the rate of photosynthesis in pondweed.
Suggest one way to improve the reliability of the results AND one way to improve the validity of the experiment. (4 marks)
4 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.