Dichotomous key

Dichotomous keys are used to identify algae by organization and questions to help identify them. You start with the first question and depending on the answer you follow the order that it tells you until you reach the organism that is most likely what you were trying to identify. It is very basic but very helpful. It took awhile to make my own key but I used some different questions than the sample, but I based it off of the sample. I got stuck a few times, but mainly used the look of the algae and not the actual properties. Color and shape were the biggest ones I used and whenever I got stuck I just looked for differences in the shape, color, size, etc.