Grace Chan's answer to Emily's Primary 5 Maths Fractions Singapore question.

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Grace Chan
Grace Chan's answer
10 answers (A Helpful Person)
1st
Carbon dioxide will take in by the plants to undergo photosynthesis ( the method that plants make their own food )
The end product of photosynthesis is Oxygen is the first set up the plants take in Carbon dioxide from the normal water and release back Oxygen into the water
For 2nd set up Carbon dioxide is absorb by the substances X thus there is no Carbon dioxide in the liquid submerged the plant thus photosynthesis cannot occur and oxygen cannot produce by the plant
Hopefully this is correct :)