Question 1 What are pathogens? Question 2 What are communicable diseases? Question 3 Name one disease which spreads by breathing in air contaminated by micro-organism? Question 4 Name one disease which spreads through insect bite? Question 5 Name one disease which spreads through infected food or water? NCERT Solutions Class 8 Science Harmful … [Read more...] about Harmful Micro-Organism
Micro-organism:Friend and Foe
Cleaning the Environment
Question 1 How do micro-organism help in cleaning the environment? Cleaning the Environment Some micro-organism decompose the organic matter present in the dead plants, dead animals and animal wastes, and convert them into simple substances which mix up with the soil. Since micro-organism decompose the harmful and smelly dead remains of plants and animals and animal … [Read more...] about Cleaning the Environment
Increasing Soil Fertility
Question 1 State one important function performed by rhizobium and blue green algae? Question 2 Name one biological nitrogen fixer? Question 3 Name the micro-organism which can fix atmospheric nitrogen in the soil? Question 4 How do micro-organism help in increasing soil fertility? NCERT Solutions Class 8 Science Increasing Soil Fertility Some of the … [Read more...] about Increasing Soil Fertility
Medicinal Use of Micro-Organism
Question 1 Name any 2 antibiotics? Question 2 Name diseases which can be prevented by vaccination? Question 3 Name the scientist who discovered the vaccine for small pox? Question 4 Name the scientist who discovered penicillin? Question 5 What are antibiotics? Question 6 What precautions must be taken while taking antibiotics? Question 7 Why antibiotics are … [Read more...] about Medicinal Use of Micro-Organism
Commercial use of Micro-Organism
Question 1 Which micro-organism is used for the large scale production of alcohol? Question 2 Define the term fermentation? Question 3 Name the scientist who discovered fermentation? Question 4 Describe how sugar is converted into alcohol? Question 5 What is vinegar? NCERT Solutions Class 8 Science Commercial Use of Micro-Organism They are used for the … [Read more...] about Commercial use of Micro-Organism