Dichotomous Key Notes

Dichotomous Key• Key used to identify an

organism by choosing from pairs of descriptions of characteristics of the organism

Rules for using a dichotomous key

1. Always start at the top

2. Compare one organism at a time, read the choice and decide if yes or no.

3. Follow next step and eliminate options until its narrowed down to just one

Practice with this picture

Jay A

Jay B