Define immunisation. 

Important Questions on Why Do We Fall Ill?

EASY

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 2

Why the lack of public hygiene is called a secondary cause of disease? 

EASY

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 3

Name two sexually-transmitted diseases. 

EASY

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 4

What is the causative agent of peptic ulcers? 

EASY

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 5

Why is Edward Jenner called "Father of Immunology"? 

MEDIUM

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 6

Why a person who had earlier chickenpox disease has lesser chances of chickenpox again?

MEDIUM

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 7

Differentiate between acute and chronic diseases giving one example of each. 

EASY

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 8

Enlist two modes of prevention of air-borne diseases.

MEDIUM

9th CBSE

IMPORTANT

MODERN's abc+ OF SCIENCE BIOLOGY For Class IX>Chapter 5 - Why Do We Fall Ill?>TEST YOURSELF>Q 9

Why is AIDS called acquired immunodeficiency? What is its causative agent? Enlist its target cells.