Final answer:
A dichotomous key involves two choices at each step to identify species.
Step-by-step explanation:
A dichotomous key involves two choices at each step.
For example, in a dichotomous key for identifying bird species, the first question might be whether the bird has feathers or not. If the answer is 'yes,' the student would proceed to the next question, and if the answer is 'no,' they would go to a different branch of the key. This process continues until the student reaches a single choice that matches the characteristics of the bird they are trying to identify.