GCSE Edexcel Biology Combined Science Respiration: A student investigated respirati

Question

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 test tube to hold the organisms. 
In test tube 1 the student placed four germinating peas. 
In test tube 2 the student placed four dried peas. 
In test tube 3 the student placed four mealworms. 
Bungs were added to each of the test tubes. 
The three test tubes were left for one hour. 
The equipment used is shown in Figure 10.

(i) State two ways this method could be improved to make the results for these three organisms more comparable.

A student investigated respiration in three different organisms - Edexcel - GCSE Biology Combined Science - Question 6 - 2019 - Paper 1

Worked Solution & Example Answer:A student investigated respiration in three different organisms - Edexcel - GCSE Biology Combined Science - Question 6 - 2019 - Paper 1

State two ways this method could be improved to make the results for these three organisms more comparable.

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