A student of taxonomy was puzzled when told b | vedclass

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(B) The 'Key' referred to by the professor is a taxonomic key,which is an important taxonomic aid used for the identification of plants and animals.It

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$A$ taxonomic key used for the identification of organisms based on contrasting characters.

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(B) The 'Key' referred to by the professor is a taxonomic key,which is an important taxonomic aid used for the identification of plants and animals.It is based on the use of contrasting characters,generally in a pair called a couplet.$A$ couplet represents the choice made between two opposite options,where one is accepted and the other is rejected.Each statement in the key is called a 'lead'.Keys are analytical in nature and separate keys are required for each taxonomic category,such as family,genus,and species.They provide a systematic,step-by-step process to identify an organism based on its morphological characteristics.

Column $X$	Column $Y$
$(1)$ Botanical Garden	$(P)$ Key to prepare modern classification systems
$(2)$ Herbarium	$(Q)$ Provides information about rehabilitation and care of rescued animals
$(3)$ Museum	$(R)$ Systematic collection of living plants for scientific purposes
$(4)$ Zoological Park	$(S)$ Aimed at preserving biodiversity and cultural heritage

$A$ student of taxonomy was puzzled when told by his professor to look for a key to identify a plant. He went to his friend to clarify what 'Key' the professor was referring to? What would the friend explain to him?

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