Define vaccines.

Important Questions on Why Do We Fall Ill?

EASY

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 7

Who gave the idea of vaccination for the first time? (Alexander Fleming/ Edward Jenner/ Antonie van Leeuwenhoek)

MEDIUM

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 1

What are non-infectious diseases? Give two examples of non-infectious diseases.

MEDIUM

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 2

Give an account of malaria giving its causative agent, symptoms and control measures.

EASY

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 3

How do bacteria protect themselves?

EASY

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 3

How is rabies virus spread?

EASY

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 4

A mother who had suffered from chicken pox in her childhood, is now taking care of her child who is suffering from the same disease. What are the chances of that mother having chicken pox ? Explain.

EASY

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 5

Sweety suffered from chicken-pox this year. Her grandmother told her that now she would not suffer from this disease again. What is the reason for such a saying?

EASY

9th CBSE

IMPORTANT

Biology for Class IX>Chapter 5 - Why Do We Fall Ill?>Exercise>Q 6

Which system of our body is activated in response to infection and how it responds?