DICHOTOMOUS KEY.

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Dichotomous Keys.

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Presentation transcript:

DICHOTOMOUS KEY

DICHOTOMOUS KEY The word dichotomous comes from two Greek words that together mean, "divided in two parts". A dichotomous key is a tool that can be used to easily identify an unknown organism.

HOW TO USE A DICHOTOMOUS KEY? A dichotomous key consists of a series of two part statements that describe characteristics of organisms. At each step of a dichotomous key the user is presented with two choices. As the user makes a choice about a particular characteristic of an organism they are led to a new branch of the key. Eventually the user will be led to the name of the organism that they are trying to identify.

MAKE A DICHOTOMOUS KEY OF THE CLASS What characteristics do we have that we could use to separate the class from a broad group to more specific groups?