Final answer:
Yes, dichotomous keys may require additional information about the organism that is not already given on the key.
Step-by-step explanation:
Yes, dichotomous keys may require additional information about the organism that is not already given on the key. A dichotomous key is a tool used to identify organisms based on observable characteristics. It presents a series of questions with two mutually exclusive answers, which help narrow down the possibilities and lead to the correct identification of the organism. Sometimes, certain characteristics of an organism may not be included in the key, so additional knowledge about the organism or further experimentation may be needed to make an accurate identification.