EVERYDAY SCIENCE

Detailed explanation-1: -A dichotomous key is an important scientific tool, used to identify different organisms, based the organism’s observable traits. Dichotomous keys consist of a series of statements with two choices in each step that will lead users to the correct identification.

Detailed explanation-2: -A dichotomous key breaks down identification into two mutually exclusive options at each step. To use the key, the scientist starts at the top, or beginning, and sees which of the two options apply to their organism. Based on their answer, the key directs them to a new question.

Detailed explanation-3: -How is a dichotomous key used? Observable characteristics of the organisms are checked through a sequence of two-part steps until an identification is listed in the key.

Detailed explanation-4: -To classify organisms, scientists will often use a biological key or a dichotomous key. A dichotomous key is a listing of specific traits, primarily structural, that allows an organism to be sorted into one of two categories. By using a dichotomous key unknown organisms can be identified.

Detailed explanation-5: -As a branching flowchart (diagrammatic representation) As a series of paired statements laid out in a numbered sequence (descriptive representation)