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In a dichotomous key, each branch typically presents two options, allowing the user to make a choice between two contrasting characteristics or traits. This binary approach helps narrow down the identification of an organism step by step until the final identification is reached. Each decision leads the user to the next set of options until they arrive at the correct specimen.

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3mo ago

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A dichotomous key is an outline of a classification system that seeks to identify common organisms (usually trees, flowers, birds or other groups of similar organisms) by systematically evaluating individual characteristics. The name is derived from what it does - provides the instructions (key) for separating organisms into two ("di") groups and then subdividing those groups into two until only one organism is left in the group.


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Dichotomous key