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

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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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