can someone suugest me some topics on biology investigatory project .....pls.

Some of the investigatory projects you can take up are as under

1.The effectiveness of Antiseptics and soaps on household bacteria 

2.Best conditions for mushroom production 
 
3. The effects of antibiotics on bacterial count 

4. Which disinfectant kills the most bacteria and  Which disinfectant is safest to use.

5. Separation of DNA and its separation through gel electrophoresis. 

6. Biogas production from cow dung.

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