What do Dichotomous keys ask?

A dichotomous key is a tool used to identify organisms by asking a series of questions, or couplets, about their characteristics. Each couplet presents two contrasting statements, and the user selects the statement that best describes the organism being identified. The process continues until the organism is identified to a specific taxon, such as a genus or species.

Each couplet in a dichotomous key is designed to divide the group of organisms being considered into two distinct groups based on a specific characteristic. These characteristics can include physical features, such as the presence or absence of certain structures, or ecological traits, such as habitat preference or diet. By progressively narrowing down the options, the dichotomous key leads the user to the correct identification of the organism.

Here are some examples of questions that might be asked in dichotomous keys:

- Does the organism have wings?

-a) Yes; go to couplet #3

-b) No; go to couplet #5

- Does the organism have green leaves?

-a) Yes; go to couplet #7

-b) No; go to couplet #9

- Does the organism live in aquatic environments?

-a) Yes; go to couplet #11

-b) No; go to couplet #13