Which key are helps in identification based on characterstics?
A key is a tool which is used in taxonomy to identify a certain organism. It is one of the most useful tools available for the identification of unknown organisms. The branch of systematics completely rely on keys to help identify known organisms and determine whether a new organism has been discovered or not. They are usually created for a particular group of organisms for the organisms of a particular region as it is difficult to incorporate all the organisms in a single key. Therefore, they are chosen according to the need and diversity of the organisms.
On the basis of characteristics, organisms are identified with the help of dichotomous keys. It is the most commonly used type of identification key. It allows the user to identify the organism using a sequence of alternative choices of the contrasting features that have two possible outcomes. The term dichotomous comes from Greek root dich which means "two" and temnein which means "to cut".
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