HARD
12th CBSE
IMPORTANT
Earn 100

Differentiate between active and passive immunity.

Important Questions on Human Health and Disease
HARD
12th CBSE
IMPORTANT
Comment on the role of vaccination and immunisation in keeping the human population healthy.

EASY
12th CBSE
IMPORTANT
The main barrier that prevents the entry of micro-organisms into our body is

MEDIUM
12th CBSE
IMPORTANT
It is often observed that the chances of a person suffering from measles in his or her lifetime are low if he or she has suffered from the disease in their early childhood. Justify the statement.

HARD
12th CBSE
IMPORTANT
A student on a field trip suddenly felt breathlessness and started to sneeze very badly. Name this response and explain what it is due to.
