Nitrogen Cycle

Question 1 Explain nitrogen cycle in atmosphere? Question 2 Define nitrogen cycle? Nitrogen Cycle Nitrogen is required by both,plants and animals for their growth and development. It is an essential component of proteins which make up the bodies of plants and animals. It is also present in chlorophyll,nucleic acid and vitamins. The circulation of nitrogen…

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Nitrogen Fixation

Question 1 Name the micro-organism which can fix atmospheric nitrogen in the soil? Question 2 What type of plants can fix nitrogen gas of the air into compounds of nitrogen? Question 3 Name the micro-organism present in the soil and in the root nodules of leguminous plants? Question 4 Where do Rhizobium live? Question 5…

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Preservation of Food by Mustard oil and Vinegar, Chemicals, Pasteurisation, Air-tight packets

Question 1 Name food material which are preserved by mustard and vinegar? Question 2 Name food material which are preserved by using chemicals as preservatives? Question 3 Name food material which are preserved by pasteurisation? Question 4 Name food material which are preserved in air-tight packets? Question 5 Name some preservatives which are used in the preservation of…

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Preservation by sun-drying,heating,cooling

Question 1 Name food material which can be preserved by heating? Question 2 Name food material which can be preserved by cooling? Question 3 Name food material which can be preserved by sun-drying? Question 4 How do you preserve food by heating? Question 5 How do you preserve food by cooling? Question 6 How do you preserve…

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Preservation by Deep freezing,common salt,sugar

Question 1 Name food material which can be preserved by using sugar? Question 2 Name food material which can be preserved by using common salt? Question 3 Name food material which can be preserved by deep freezing? Question 4 How do you preserve food by deep freezing? Question 5 How do you preserve food by using common…

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Preservation of food

Question 1 What is meant by food preservation? Question 2 Name methods of preserving food? Preservation of food The food material like milk,fruits,vegetables,meat,fish and cooked food get spoiled easily.This is because they contain a lot of water due to which the food-spoiling micro-organism can grow in them easily. The process in which the food materials…

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Disease causing micro-organism in animals

Question 1 Name the causative micro-organism of animal disease foot and mouth? Question 2 Name the causative micro-organism of animal disease Anthrax? Question 3 Name the causative micro-organism of animal disease Aspergillosis? Disease causing micro-organism in animals Some of the examples of diseases caused in animals by micro-organism are:Foot and mouth disease,Anthrax and Aspergillosis. 1)Foot and mouth…

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Disease causing micro-organism in plants

Question 1 Name one plant disease caused by fungi? Question 2 Name one plant disease caused by virus? Question 3 Name one plant disease caused by bacteria? Question 4 What is the mode of transmission of disease rust of wheat? Question 5 What is the mode of transmission of disease citrus canker? Question 6 What is the mode of…

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Carriers of disease causing micro-organism

Question 1 Name any 2 diseases spread by housefly? Question 2 Name 2 insects which act as carrier of disease causing micro-organism? Question 3 Name the insect which acts as carriers of parasite of malaria? Question 4 Name the insect which carries dengue? Question 5 Name the diseases spread by mosquito? Question 6 Name the…

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Food poisoning

Question 1 Define the term food poisoning? Question 2 How is food poisoning caused? Question 3 What are the various symptoms of food poisoning? Question 4 Name 2 bacteria which cause food poisoning? Question 5 Name a fungus which cause food poisoning? Food poisoning If the food is not covered properly,stored properly or preserved properly,then…

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Harmful micro-organism

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? Harmful micro-organism Those micro-organism which cause diseases are called…

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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 wastes into…

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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? Increasing soil fertility Some of the micro-organism present in the soil can…

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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…

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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? Commercial use of micro-organism They are used for the large scale production of alcohol…

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Groups of Micro-organism

Question 1 What is the name of micro-organism which reproduce only inside the living cells of other organism? Question 2 What are the major groups of micro-organism? Question 3 Name any 2 diseases caused by bacteria? Question 4 Name any 2 diseases caused by virus? Question 5 Name any 2 diseases caused by algae? Question 6 Name any…

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Making of curd and bread

Question 1 which micro-organism is utilised in making curd from milk? Question 2 How do micro-organism convert milk into curd? Question 3 Name the micro-organism used in baking industry? Question 4 How yeast help in making of making of bread? Question 5 Name the sugar present in milk? Making of curd Milk is turned into…

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Useful micro-organism

Useful micro-organism 1)They are utilised in the making of curd,bread and cake. 2)They are used in the production of alcohol,wine,acetic acid. 3)They are used in the preparation of medicines called antibiotics. 4)They are used in agriculture to increase the fertility of soil. 5)They clean up the environment by decomposing the organic matter of dead plants,dead…

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