EASY
8th CBSE
IMPORTANT
Earn 100

Why are children given vaccination?

Important Questions on Micro-Organisms: Friend and Foe
EASY
8th CBSE
IMPORTANT
What is meant by 'nitrogen fixation'? State two ways in which nitrogen gas of the atmosphere can be 'fixed' in nature to get nitrogen compounds in the soil.

MEDIUM
8th CBSE
IMPORTANT
Draw a neat, labelled diagram of nitrogen cycle in nature. Which natural phenomenon occurring in the sky is responsible for nitrogen fixation?

EASY
8th CBSE
IMPORTANT
The bread dough rises because of

EASY
8th CBSE
IMPORTANT
Yeast is used in the production of

MEDIUM
8th CBSE
IMPORTANT
The process of conversion of sugar into alcohol is called

MEDIUM
8th CBSE
IMPORTANT
Which of the following is an antibiotic?

EASY
8th CBSE
IMPORTANT
The most common carrier of communicable diseases is

EASY
8th CBSE
IMPORTANT
The carrier of malaria-causing protozoan is
