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A student investigated respiration in three different organisms - Edexcel - GCSE Biology - Question 3 - 2019 - Paper 1
Question 3
A student investigated respiration in three different organisms. Red hydrogen carbonate indicator was placed in each of three test tubes. Gauze was placed in each t... show full transcript
Worked Solution & Example Answer:A student investigated respiration in three different organisms - Edexcel - GCSE Biology - Question 3 - 2019 - Paper 1
Step 1
State two ways this method could be improved to make the results for these three organisms more comparable.
Answer
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Ensure that the temperature and environmental conditions are consistent for all test tubes to minimize external influences on respiration rates.
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Use the same number of organisms in each test tube to provide a valid comparison of respiration between the different types.