Question

a student conducted an experiment to show CO2 is released during respiration. list two precautions that she must take for obtaining correct observations

Answer 1

The set up should be air tight.
Germinating seeds (living) should be used.


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Answer 2

1. make sure to use freshly prepared lime water.
2. also make sure to blow continuously for 1 minute until the limewater turns milky.

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