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Taxonomical aids - key

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2022 Phase 2 1 question

Which of the following are true about the taxonomical aid 'key'? (a) Keys are based on the similarities and dissimilarities. (b) Key is analytical in nature. (c) Keys are based on the contrasting characters in pair called Couplet. (d) Same key can be used for all taxonomic categories. (e) Each statement in the key is called Lead. Choose the most appropriate answer from the options given below:

2019 Odisha 1 question

The contrasting characteristics generally in a pair used for identification of animals in Taxonomic Key are referred to as: