Please solve 2, four

Dear Student

Your question is not very clear. Please mention clearly which 2 and 4 questions you are asking.
Assuming part 2 and 4 of first question, I am answering those.

2. (ii) Photosynthesis is the process by which green plants in the presence of sunlight use carbon dioxide from air and water from soil to synthesise food. It also uses chlorophyll and release oxygen as by-product.

(iv) Test tube B contains plant and snail, so there is more carbon dioxide present in the test tube due to respiration of snail. Hence, rate of photosynthesis increases and more oxygen is evolved.


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