Multiple choice questions VIII — task. Science CBSE, Class 9.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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1. We should not allow mosquitoes to breed in our surroundings because they

multiply very fast and cause pollution
are not important insects
bite and cause skin diseases
are vectors for many diseases

2. You are aware of Polio Eradication Programme in your city. Children are vaccinated because

vaccination kills the polio causing microorganisms
prevents the entry of polio causing organism
it creates immunity in the body
all the above

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