EASY
8th CBSE
IMPORTANT
Earn 100

Name two food materials which can be preserved by using oil or vinegar.

Important Questions on Micro-Organisms: Friend and Foe

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 35
Name any two special chemicals which are used as food preservatives.
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 36
Name the micro-organisms which can fix atmospheric nitrogen in the soil.
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 37
What type of plants can fix nitrogen gas of the air into compounds of nitrogen?
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 38
Name the microorganism present in the soil and in the root nodules of leguminous plants which can fix atmospheric nitrogen. (Rhizobium/E.coli)
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 39
Name two leguminous plants which can fix nitrogen.
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 40

Fill in the blank with the correct option provided in the bracket.

Alcohol is produced with the help of microorganisms commonly called _____(Yeast/Rhizopus).

EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 40
Blue-green algae fix _____ directly from air to enhance fertility of soil.(Write answer in one word)
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 2 - Micro-Organisms: Friend and Foe>Very Short Answer Type Questions>Q 40
Bacteria can be seen with the help of a _____.