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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...

  Biological Classification MCQs 1. Which of the following organisms can be found in extreme saline conditions? a. Eubacteria b. Archaebacteria c. Cyanobacteria d. Mycobacteria 2. Linnaeus used which kingdom of classification? a. Artificial system b. Natural system c. Phylogenetic system d. Asexual system 3. Smallest taxon of classification is _______. a. Kingdom b. Family c. Variety d. Species 4. In which of the following kingdom are Archaea and Nitrogen-fixing organisms classified? a. Animalia b. Plantae c. Monera d. Fungi 5. Bentham and Hooker gave which system of classification? a. Numerical b. Phylogenetic c. Artificial d. Natural 6. What is the main basis of classification in the five-kingdom system? a. Structure of the nucleus b. Structure of cell wall c. Asexual Reproduction d. Mode of Nutrition 7. Which of the following statements is false about the fungi? a. They are eukaryotes b. They are heterotrophs c. They possess a purely cellulosic cell wall d. None of the above 8. ...