Class 7 Science MCQs – Certification Test 1611

Safe and Drinking Water MCQ (Question 1611) – App & e-Book Download

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MCQ 1611: The bacteria that decompose algae take up all the:

sunlight
oxygen
minerals
useful gases in the water

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The App: Safe and Drinking Water MCQ App to Study Safe and Drinking Water Notes, 7th Grade Science MCQ App, and 8th Grade Science MCQ App to simulate experiments digitally.

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