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Class 8 Biology Chapter List
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2. Microorganisms: Friend and Foe
2. Microorganisms: Friend and Foe
19 Maths Exercise Solutions
How do you prevent the spread of communicable diseases?
Question No.1
How do you prevent the spread of communicable diseases?
Short answer question:
Why does the milk that comes in packets not spoil? What is pasteurisation?
Question No.2
Short answer question:
Why does the milk that comes in packets not spoil? What is pasteurisation?
Fill in the blank:
Microorganisms can be seen with the help of a
___
.
Question No.3
Fill in the blank:
Microorganisms can be seen with the help of a
___
.
Fill in the blank:
Blue green algae fix
___
directly from air and enhance fertility of soil.
Question No.4
Fill in the blank:
Blue green algae fix
___
directly from air and enhance fertility of soil.
Fill in the blank:
Alcohol is produced with the help of
___
.
Question No.5
Fill in the blank:
Alcohol is produced with the help of
___
.
Fill in the blank:
Cholera is caused by
___
.
Question No.6
Fill in the blank:
Cholera is caused by
___
.
Yeast is used in the production of
( )
A
.
sugar
B
.
alcohol
C
.
hydrochloric acid
D
.
oxygen
Question No.7
Yeast is used in the production of
( )
A
.
sugar
B
.
alcohol
C
.
hydrochloric acid
D
.
oxygen
The following is an antibiotic
( )
A
.
Sodium bicarbonate
B
.
Streptomycin
C
.
Alcohol
D
.
Yeast
Question No.8
The following is an antibiotic
( )
A
.
Sodium bicarbonate
B
.
Streptomycin
C
.
Alcohol
D
.
Yeast
Carrier of malaria-causing protozoan is
( )
A
.
female
mosquito
B
.
cockroach
C
.
housefly
D
.
butterfly
Question No.9
Carrier of malaria-causing protozoan is
( )
A
.
female
mosquito
B
.
cockroach
C
.
housefly
D
.
butterfly
The most common carrier of communicable diseases is
( )
A
.
ant
B
.
housefly
C
.
dragonfly
D
.
spider
Question No.10
The most common carrier of communicable diseases is
( )
A
.
ant
B
.
housefly
C
.
dragonfly
D
.
spider
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