Q5. What is a key? How is it helpful in the identification and classification of an organism?
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a small piece of shaped metal with incisions cut to fit the wards of a particular lock, which is inserted into a lock and turned to open or close it.
Key is a taxonomical aid that helps in identification of plant and animal species. These keys are based on similarities and dissimilarities in characters, generally in a pair called couplet. Each statement in a taxonomic key is referred to as a lead. ... It is also useful in identification of unknown organisms.
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A key is used to open a lock .It is necessary that the lock and key of the same no.
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