Dichotomous keys are used to identify plant and animals and also it is an indicative parameter of relationship between two species. The dichotomous key consists of series of choices associated with questions one after the other which helps in identifying an organism. For example for identification of any plant, the first question would be “does the plant have leaves” with option either “yes” or “No”. If the answer to this question is yes, the next question will be related to some distinguishing characteristic of leaves. If the answer to this question is “no” a new set of question will come related to some other part of plant.
