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The Living World
Question
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Why are the classification systems changing every now and then?

Answer

Millions of plants, animals, and microorganisms are found on earth, many of which are still unclassified. Scientists keep on discovering new species  around the world. Some of these cannot be placed in the traditional classification system.  Therefore, to classify these newly discovered species, with new characters, new systems of classification have to be devised every now and then. 

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Some More Questions From The Living World Chapter

What different criteria would you choose to classify people that you meet often?

What do we learn from identification of individuals and populations? 

Given below is the scientific name of Mango. Identify the correctly written name.

Mangifera Indica

Mangifera indica 

Define a taxon. Give some examples of taxa at different hierarchical levels.

Try to collect all the currently accepted meanings for the word ‘species’. Discuss

with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand. 

How is a key helpful in the identification and classification of an organism?

Illustrate the taxonomical hierarchy with suitable examples of a plant and an

animal. 

Define and understand the following terms: 


(i) Phylum 

Define and understand the following terms: 

(ii) Class