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Chapters
▶ 2: Microorganisms : Friend and Foe
3: Coal and Petroleum
4: Combustion and Flame
5: Conservation of Plants and Animals
6: Reproduction in Animals
7: Reaching the Age of Adolescence
8: Force and Pressure
9: Friction
10: Sound
11: Chemical Effects of Electric Current
12: Some Natural Phenomena
13: Light
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Solutions for Chapter 2: Microorganisms : Friend and Foe
Below listed, you can find solutions for Chapter 2 of CBSE NCERT for Science [English] Class 8.
NCERT solutions for Science [English] Class 8 2 Microorganisms : Friend and Foe Exercises [Pages 29 - 30]
Fill in the blanks.
Microorganisms can be seen with the help of a _________.
Blue green algae fix _________ directly from air to enhance fertility of soil.
Alcohol is produced with the help of _________.
Cholera is caused by _________.
Choose the correct answer.
Yeast is used in the production of ______.
sugar
alcohol
hydrochloric acid
oxygen
The following is an antibiotic.
Sodium bicarbonate
Streptomycin
Alcohol
Yeast
Carrier of malaria-causing protozoan is ___________.
female anopheles mosquito
cockroach
housefly
butterfly
The most common carrier of communicable diseases is ___________.
ant
housefly
dragonfly
spider
The bread or idli dough rises because of ______.
heat
grinding
growth of yeast cells
kneading
The process of conversion of sugar into alcohol is called ___________.
nitrogen fixation
moulding
fermentation
infection
Match the organisms in Column A with their action in Column B.
| A | B | ||
| (i) | Bacteria | (a) | Fixing Nitrogen |
| (ii) | Rhizobium | (b) | Setting of curd |
| (iii) | Lactobacillus | (c) | Baking of bread |
| (iv) | Yeast | (d) | Causing Malaria |
| (v) | A protozoan | (e) | Causing Cholera |
| (vi) | A Virus | (f) | Causing AIDS |
| (g) | Producing antibodies |
Can microorganisms be seen with the naked eye? If not, how can they be seen?
What are the major groups of microorganisms?
Name the microorganisms which can fix atmospheric nitrogen in the soil.
Write 10 lines on the usefulness of microorganisms in our lives.
Write a short paragraph on the harmful effects of microorganisms.
What are antibiotics?
What precautions must be taken while taking antibiotics?
Solutions for 2: Microorganisms : Friend and Foe
NCERT solutions for Science [English] Class 8 chapter 2 - Microorganisms : Friend and Foe
Shaalaa.com has the CBSE Mathematics Science [English] Class 8 CBSE solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. NCERT solutions for Mathematics Science [English] Class 8 CBSE 2 (Microorganisms : Friend and Foe) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Science [English] Class 8 chapter 2 Microorganisms : Friend and Foe are Microorganisms (Microbes) and Microbiology, Methods of Food Preservation, Where Do Microorganisms Live?, Useful micro-organisms, Harmful Microorganisms, Food and Micro-organisms, Nitrogen Fixation, Nitrogen Cycle, Microorganisms (Microbes) and Microbiology, Methods of Food Preservation, Where Do Microorganisms Live?, Useful micro-organisms, Harmful Microorganisms, Food and Micro-organisms, Nitrogen Fixation, Nitrogen Cycle.
Using NCERT Science [English] Class 8 solutions Microorganisms : Friend and Foe exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in NCERT Solutions are essential questions that can be asked in the final exam. Maximum CBSE Science [English] Class 8 students prefer NCERT Textbook Solutions to score more in exams.
Get the free view of Chapter 2, Microorganisms : Friend and Foe Science [English] Class 8 additional questions for Mathematics Science [English] Class 8 CBSE, and you can use Shaalaa.com to keep it handy for your exam preparation.
