The taxonomical aid called dichotomous key is

useful in classification of animals and plants

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based on similarities and dissimilarities of characters

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common for taxonomic categories like genus, family

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an index to the flora of a particular area

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Solution

The correct option is B based on similarities and dissimilarities of characters
Key is a taxonomical aid used for identification of plants and animals. A dichotomous key has two statements each having a contrasting pair of a particular characteristic. Each statement is called a lead. Two leads together is called a couplet. Based on which lead an organism matches, it is identified.

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Similar questions

Taxonomic key is one of the taxonomic tools in the identification and classification of plants and animals. It is used in the preparation of

(a) monographs

(b) flora

(d) None of these

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