NCERT Exempler XVI — task. Science CBSE, Class 8.

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1. Name two diseases that are caused by virus.

Escherichia coli & Chicken pox
Influenza & chickenpox
Bacillus subtilis & Chicken pox
Mycobacterium tuberculosis & Chicken pox

2. Write one important characteristic of virus.

Can reproduce only in aliving host.
Helpful to humans
Can be seen with naked eye
Classified into Gram positive and negative

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