Flashcards
Class 8, Chapter 2 - Microorganisms: Friend and foe | NCERT
Which microorganisms reproduce only inside cells of host organism?
protozoa
fungi
algae
viruses
bacteria
Which diseases are caused by protozoa?
malaria
tuberculosis
cold
dysentery
influenza
Amoeba is a representative of:
Protozoa
Fungi
Algae
Bacteria
Which microorganisms may be multicellular?
bacteria
protozoa
fungi
algae
True or false?
Microorganisms are used in agriculture for fixing nitrogen.
True or false?
Fungi is used in curd production.
True or false?
Yeast produces nitrogen during respiration.
What is fermentation?
It is a process of conversion of sugars into alcohol.
Match a scientist with his discovery
Alexander Fleming
penicillin
Match a scientist with his discovery
Louis Pasteur
fermentation
Match a scientist with his discovery
Edward Jenner
smallpox vaccine
Match a scientist with his discovery
Robert Koch
Bacillus anthracis
Describe process of milk pasteurisation.
Milk is heated to about 70°C for 15 to 30 seconds and then suddenly chilled.
AIDS is caused by:
a fungi
a virus
a bacteria
a protozoa
How do we call insects and animals that can pass a diseasce causing microbes to us?
carriers
How much of the Earth's atmosphere is made up of nitrogen?
65%
81%
78%
73%
{navButtons}