CBSE Class 8 Science - Biology Microorganisms Friend and Foe - Worksheet (#cbse)(Class8Biology)(#eduvictors)

Class 8 Science - Biology Microorganisms Friend and Foe - Worksheet 

Fill in the blanks with suitable words:


1. The science which studies about microorganisms is known as _________________.


2. Microbes can be seen with the help of a  _______________.


3. Blue-green algae fix ___________  directly from air to enhance the fertility of the soil.


4. Alcohol is produced with the help of ___________


5. Cholera is caused by ________.




6. Name the microbe which does not have definite shape: ____________.


7. Name the microbes that have chlorophyll: __________.


8. ___________ discovered biochemical process called fermentation.


9. Mushrooms are placed in _________.


10. Amoeba and Plasmodium are placed in ___________.


11. _________ shaped bacteria are called bacilli.


12. Yogurt is prepared by adding __________ bacteria to milk.


13. _________ do not have cellular structure.


14. Agar is obtained from ______  ________.


15. Harmful microbes that cause diseases are called _______.


16. The study of algae is called ____________.


17. Alexander Fleming of Britain in 1928 discovered the ‘Wonder Drug’ called __________.


18. Wilt of Potato is caused by __________.


19. Tobacco Mosaic disease is a ______ disease.


20. Athlete’s feet disease is caused by ________.


21. Covid-19, which belongs to Corona virus family, primarily affects ________ system of the human body.


Answers:
1: microbiology
2: microscope
3: nitrogen
4: yeast
5: bacteria
6: amoeba
7: Alga/Algae/ Blue Green Algae/Cyanobacteria  (Note: Some bacteria are photosynthetic, but that is not exactly chlorophyll.)
8: Louis Pasteur
9: Fungi
10: Protozoa
11: Rod
12: Lactobacilllus
13. Viruses
14. red algae
15. pathogens
16. Phycology
17. Penicillin
18. bacteria
19. viral
20. fungi
21. respiratory


☞See Also:
Ch 2 - Micro-organisms - Friend and Foe (Q & A)
Ch2 - Micro-Organisms - Friend and Foe (MCQs) 
Ch 2 - Micro-organisms  - Friends and Foes (Textbook Answers)
Ch 2 - Microorganisms - Friends and Foes (Q & A 2)