“Dichotomous” means “divided into two parts.” That is why dichotomous keys always give two choices in each step. In each step, the user is presented with two statements based on characteristics of the organism. If the user makes the correct choice every time, the name of the organism will be revealed at the end.
steps
Step 1: List down the characteristics. ...
Step 2: Organize the characteristics in order. ...
Step 3: Divide the specimens. ...
Step 4: Divide the specimen even further. ...
Step 5: Draw a dichotomous key diagram. ...
Step 6: Test it out.
so therefore, they change if you get it incorrect or if you answer the other question