Life Science: No.QuestionAnswer 1.Name the parts which on removal or destruction may cause the death of plantRoots 2.The cover of air around the earth is calledAtmosphere 3.Air occupiesSpace & mass 4.Plants and animals maintain the balance of what in airGases 5.The supporter of combustion in air isOxygen 6.What forms the earth's atmosphereAir 7.The major components of air areNitrogen & Oxygen 8.Water is one of the basic constituents of allLiving 9.The scientific name of Lotus isNelumbo 10.No two human beings are completelyAlike 11.The process of preparation of food by plants is calledPhotosynthesis 12.All living objects consist ofCells 13.The vegetables such as carrot,beet root and radish that you eat areRoots 14.Leaves are green because they haveChlorophy II 15.Plants manufacture food by the process ofPhotosynthesis 16.From the heart,the blood is transported to all the organs of the body byArteries 17.Which teeth are replaced by the permanent teethMilk teeth 18.The reproductive cell of male is called theSperm 19.The plants use which part of air for their foodCarbon dioxide 20.Water is one of the basic constituents of allPlant 21.Water freezes into ice at0 degree C. 22.Water boils at80 degree C. 23.The torch cell is a source of which energyElectrical 24.Which source of energy wind is?Renewable 25.Which energy is released by a transistorSound 26.Energy is always required for doingWork 27.Electrical energy is converted mainly into light energy inFilament 28.The energy hidden in atoms is calledAtomic 29.Balance in nature is the balance between the population ofSpecies 30.A famous mathematician of ancient India isAryabhatta 31.A substance which can exist as solid,liquid and gasWater 32.The power of an electric bulb is marked inWatts 33.Water stored in a high-level dam hasPotential energy 34.The dry cell produces electric energy fromChemical energy 35.The unit used for measuring distances between heavenly objects,isLight Year 36.Musical instrument in which sound is produced by the vibration of air isFlute 37.Carbohydrates are present inCane Sugar 38.The gas used for disinfecting water isChlorine 39.Sand is a compound ofSilicon 40.A mixture of salt and camphor can be separated bySublimation 41.A magnet can be used to seperate a mixture ofIron scrap and sulphur 42.The chemical which is not used for purifying water isWashing soda 43.A bird which is active during night isOwl 44.Hydrilla is a plant that grows inWater 45.A plant which stores food in the root isGinger 46.In most flowers the most colorful part is thePetal 47.The temperature of the surroundings is detected byThe Skin 48.The number of kinds of living organisms on this earth is aboutTwo & half million 49.A species of animals meansA group of similar animals 50.There are some plants which do not haveLeaves 51.An animal without a special organ for hearing isSnake 52.The sense organ in man which are sensitive to chemicals areSkin & nose 53.The tallest tree in the world isThe redwood tree 54.Normally, a housefly lives for aboutOne year 55.In the human body urine is formed inThe kidneys 56.The pancreas in our body is a part ofThe digestive system 57.The blood vessels that we can see just below the skin on the back of our palm areArteries & veins 58.The presence of starch in the leaf is shown byIodine 59.All the cells are similar in structure and function inA tissue 60.The source of energy for all living things isThe sun 61.An animal which cannot take solid food isButterfly 62.Anaemia is usually caused byGlucose 63.The simplest form of carbohydrate isAminoacid 64.The smallest unit of a protein is80-90 65.The percentage of weight of water in our body is aboutC 66.Scurvy is caused by lack of vitaminVitamins 67.Vegetables are included in our diet because mostly they supplyVitamins 68.The most widely seen minerals in the bones areCalcium and Phosphorus 69.Disgested food is mostly absorbed through theSmall intestine 70.The diet of a 2-year old baby should contain moreProtein 71.Tobacco plant makes nicotine inThe leaves