science biology class 9 question
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Explanation: For number 8a
Wash your hands often. ...
Get vaccinated. ...
Use antibiotics sensibly. ...
Stay at home if you have signs and symptoms of an infection. ...
Be smart about food preparation. ...
Disinfect the 'hot zones' in your residence
For number 9
An advantage of composite fish culture is that it increases the yield of fish.
Nearly, five or six different species are grown together in a single fish pond.
The survival rate of fish increases
Yield also increases without affecting the other species.
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