Dichotomous keys
A dichotomous key helps to determine the identity of animals, plants and other living things. It consists of a series of choices, each with just two possible answers that lead the user to the correct name of a given item. (“Dichotomous" means "divided into two parts", a reference to the number of choices available at each stage).
A dyed cotton mouse with keys (dichotomous keys) has to unlock the door that best describes an aspect of her anatomy to move closer to identifying what she is.
