Question Bank

PUC Question Bank

• All Subjects Model Papers of 2nd PU Science, Arts & commerce

• All Subjects Model Papers of 1st PU Science, Arts & commerce

• The waste materials that can be converted into simple non toxic materials by microbial activity are called Biodegredable waste
• The waste materials that cannot be converted into simple substances by microbes are called Non biodegradable waste
• An example for biodegradable waste is Vegetable peels
• An example for Non biodegradable waste is Plastic pipe
• Most of the organisms live in the temperature range of about 10 to 40^oC
• An example for the endangered species is Asiatic lion
• The judicious use and management of resources is called Conservation
• The project undertaken by the government of India to increase the population of Tigers is Project Tiger
• The uncultivated plants and non domesticated animals are called Wild Life
• The physical and biological world that an organism lives in and with which it interacts is called as Environment
• The part of earth and the atmosphere which is inhabitated by living beings is called Biosphere
• The microscopic organisms which feed on the dead remains other of other animals are called decomposers
• The cyclic movement of various nutrients in the biosphere is called Bio-geo chemical cycle
• The process of converting free gaseous nitrogen of the atmosphere into useful forms of compounds of nitrogen is called Nitrogen Fixation
• The undesirable changes in the physical, chemical and biological characteristics of the environment is called Environmental pollution
• The interacting system of organisms together with the environmental factors with which they interact is called Ecosystem
• The movement or entry of a chemical substance from the reservoir pool to the exchange pool is called Fixation
• The movement or entry of chemical substances from the exchange pol to the reservoir pool is called recycling
• The process of conversion of complex organic compounds like proteins into ammonium salts by the action of microorganisms is called Ammonification
• The process of conversion of ammonium salts into water soluble nitrates and nitrites by the action of bacteria is called Nitrification

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