Human Reproduction Question 222

Question: Polluted water can be purified by using [CBSE PMT 1990]

Options:

A) Micro-organisms

B) Algae

C) Pesticides

D) Fishes

Show Answer

Answer:

Correct Answer: A

Solution:

Because in the presence of oxygen micro-organisms (Bacteria) oxidise the complex organic components to inorganic forms.

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