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Class 11 Important Questions for Biology Chapter 1 Living World Question 1: Why are living organisms classified? ANSWER: A large variety of plants, animals, and microbes are found on earth. All these living organisms differ in size, shape, colour, habitat, and many other characteristics. As there are millions of living organisms on earth, studying each of them is impossible. Therefore, scientists have devised mechanisms to classify all living organisms. These methods of classification are based on rules and principles that allow identification, nomenclature, and finally classification of an organism. Question 2: Why are the classification systems changing every now and then? ANSWER: Millions of plants, animals, and microorganisms are found on earth. Many of these have been identified by the scientists while many new species are still being discovered around the world. Therefore, to classify these newly discovered species, new systems of classification have to be devised every now and t...

  MCQ Questions on Plant Kingdom 1. Which plant kingdom can survive both on land and in the water? (a) Tracheophyta (b) Pteridophyta (c) Thallophyta (d) Bryophyta Answer: (d) Bryophyta 2. A plant that has seeds but no flowers and fruits? (a) Bryophytes (b) Gymnosperms (c) Mosses (d) Pteridophytes Answer: (b) Gymnosperms 3. Most primitive vascular plants? (a) Mosses (b) Cycads (c) Kelps (d) Ferns Answer: (d) Ferns 4. Angiosperms are the dominant flora because of (a) Domestication by man (b) Power of adapting in diverse habitats (c) Self-pollination property (d) Property of producing a large number of seeds Answer: (b) Power of adapting in diverse habitats 5. Plants reproducing by spores are grouped under (a) Bryophytes (b) Sporophytes (c) Cryptogams (d) Thallophytes Answer: (c) Cryptogams 6. Plants having vascular tissue without seeds (a) Angiosperm (b) Pteridophytes (c) Bryophytes (d) Gymnosperms Answer: (b) Pteridophytes 7. Double fertilization is the characteristic of (a) Algae (...