CBSE Class 8 Science Microorganisms Assignment Set A

CBSE Class 8 Science - Microorganisms. Students are advised to refer to the attached assignments and practice them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.

Q.1 Give one example of the following :

i) A unicellular algae

ii) A filamentous algae

iii) Algae forming clusters/colonies

iv) A brown algae

v) The bacteria found in curd

vi) One rod-shaped bacteria

vii) One spherical bacteria

viii) A protozoan which can photosynthesize

Q. 2 Match the columns:

i) Entamoeba histolytica a) Botulism

ii) Giardiasis b) Giardia

iii) Trypanosoma c) AIDS

iv) HIV d) Curd

v) Yeast & lactobacillus e) Amoebiasis

vi) Penicillium notatum f) Sleeping sickness

vii) Streptococcus pneumonia g) Antibiotic

viii) Clostridium botulinum h) Pneumonia

Q.3 Write briefly about the following:

i) Diatoms ii) Mildew iii) Cyanobacteria iv) Zooplanktons v) Algal bloom

vi) Spores vii) Anaerobic bacteria viii) Binary fission ix) pasteurization x) Microbiology

Q. 4 Answer the following questions:

a) List some methods of food preservation

b) Write two uses and two harms caused by the following :

i) Algae ii) Bacteria iii) Protozoa iv) Fungi

c) Draw well labelled diagram of the following :

i) Euglena ii) A bacterial cell iii) Paramecium

d) How do bacteria reproduce?

e) What is the major difference between bacterial cell and the cells of other organisms?

f) Why is “Virus” thought of as something in between the living and non-living ? How do they multiply within

a host cell?

Please click the link below to download CBSE Class 8 Science - Microorganisms

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