Science MCQs

The spleen filters blood and removes old and damaged red blood cells.

Bone marrow produces billions of new blood cells (RBCs, WBCs, platelets) every day.

Tonsils are tissues in the throat that fight infections.

Adenoids are a patch of tissue located behind the nasal cavity.

The appendix helps in the maturation of B-lymphocytes and antibody production.

Peyer's patches in the small intestine prevent the growth of pathogenic bacteria.

Adaptive immunity generates a delayed response, typically taking 5-6 days.

The best way to avoid infection is to maintain cleanliness of body and surroundings.

Hands should be washed before eating, after using the toilet, and after touching items used by a sick person.

Washing fruits and vegetables removes germs and helps prevent foodborne infections.