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Chapter: 4 WHY CLASSIFICATION?, Standard 8 Biology Worksheet. 1 (1/4), , 1. Which among the given criteria is most suitable one for the classification, between a dog and a cat? Why?, Size, Beauty, Speed, Sharp incisors, Claws that can be withdrawn into the, feet, Sound., Ans: Claws that can be withdrawn into the feet- This criteria is unique one, because only cats can withdraw their claws into their feet. Sound is another, criteria because barking sound is unique one to dog and mewing to cat. All, others are not more specific., 2. With the help of given table classify these organisms below. You should make two clear, options of dichotomous keys from the given taxonomic key to complete the table. The first row, is done for you., , Taxonomic key, Wing, , Dichotomous keys, Organisms with wings, , Organisms without wings, , Butterfly, Dragonfly, Grasshopper,, Housefly, , Snail, Spider, , Number of, wings, Peculiarity, of legs, Peculiarity, of wings, 3. What is taxonomic key?, 4. what is dichotomous key? Write down the peculiarity of dichotomous keys?, 5. What do you mean by classification?, 6. What is taxonomy? Who is known as the father of Taxonomy?, 7. Write down the significance of Taxonomy?, 8. Write down the taxonomic hierarchy of classification that proposed by Linnaeus? Explain, each levels in it?, 9. Which is the highest level and the basic level of classification?, 10. What is Species?, 11. On the basis of given illustration answer the following, questions?, a) Which are the organisms included in kingdom Animalia?, b) Why did the rabbit and cat include in Class Mammalia?, c) Why did the rabbit excluded from Order Carnivora?, d) How is Family Felidae differ from Genus Felis?, e) Write down the genus name and species name of domestic cat?, f) What do you mean by Phylum Chordata?, , PPM Ali, Seethi Sahib HSS, Taliparamba

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12. Match the columns of the table on the given seven scientists who have made valuable, contributions in the history of taxonomy. You may collect more information about these, scientists on taxonomy?, , Name of the scientist, , Life time, , Contributions, , i., ii., iii., iv., v., vi., vii, 13. Complete the table by writing the levels of classification of given organisms? Cat, Lion, and, man.?, Levels of, classification, , Cat, , Man, , Lion, , Kingdom, Phylum, Class, Order, Family, Genus, Species, 14. Write down the levels of classification of plants, Mango tree and Coconut tree?, 15. What is Binomial nomenclature? Who proposed binomial nomenclature?, 16. What is the significance of Binomial nomenclature?, 17. Write down the scientific names of the following organisms by finding out their genus name, and specific name? Some examples are given in the table, you can follow it., Human being, Elephant, Golden shower, Peacock, Dog, Hibiscus, Neem, Paddy, Tiger,, Wolf, Lion, Cat, Dog, Cow, Crow., Organism, Human being, Asian Elephant, Golden shower, , Genus, , Species, , Scientific name, , Homo, , Sapiens, , Homo sapiens, , Elephas, , maximus, , Elephas maximus, , Cassia, , fistula, , Cassia fistula, , PPM Ali, Seethi Sahib HSS, Taliparamba