Last updated on June 28th, 2023 at 11:09 pm
NCERT Solution Class 8 Chapter 2 Microorganisms
NCERT Solution Class 8 Chapter 2 Microorganisms | NCERT Solutions Class 8 Science | for all the students to prepare for their exam and H. W.
Fill in the blanks.
(a) Microorganisms can be seen with the help of a _______[microscope]
(b) Blue green algae fix _______ directly from air and enhance fertility
of soil. [nitrogen]
(c) Alcohol is produced with the help of __________.[yeast]
(d) Cholera is caused by __________.[bacteria]
Tick the correct answer.
(a) Yeast is used in the production of
- sugar
- alcohol
- hydrochloric acid
- oxygen
alcohol
(b) The following is an antibiotic
- Sodium bicarbonate
- Streptomycin
- Alcohol
- Yeast
streptomycin
(c) Carrier of malaria-causing protozoan is
- female Anopheles mosquito
- cockroach
- housefly
- butterfly
Female anopheles mosquito
(d) The most common carrier of communicable diseases is
- ant
- housefly
- dragonfly
- spider
Housefly
(e) The bread or idli dough rises because of
- heat
- grinding
- growth of yeast cells
- kneading
Growth of yeast cells
(f) The process of conversion of sugar into alcohol is called……
- nitrogen fixation
- moulding
- fermentation
- infection
Fermentation
