CBSE Class 9 Biology Health And Disease
- Explain how do the infectious disease spread.
- how do different people view health differently
- What do you mean by health
- Difference between (a) healthy and disease free (b) acute and chronic disease (c) infection and non-infection disease?
- Explain any three infectious agent?
- What is the answer of fill in the blank 'Brain is _______centre of body
- are the non communicable diseases infectious diseases ?? name any if it is.
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