- Nested Style: In a nested display of a dichotomous key, the next question in a series appears “nested” under the answer leading to that question.This is often achieved by using indentations, with each question following the first one being further indented to distinguish it from the rest.
- Linked Style:In a linked style of dichotomous key, questions are laid-out in list form.Each answer directs the user which question to ask next, and the user must find the correct question in order to properly identify the organism.
- Branching Tree: In a “branching” or “tree” layout of a dichotomous key, each of an organism’s characteristics is laid out in a style similar to a flow chart or tree of life.Each question or characteristic begins a new “branch” of the tree, with each subsequent question being a sub-branch.Identification is reached at the end of the tree’s “branches.”
- Computer Program: With handheld computers becoming more common, identification keys are increasingly being converted into computer program form.This method allows the user to answer questions one at a time, and have the correct follow-up question automatically presented.Much like popular online quizzes, in this way the user can reach the correct species identification after answering a series of either-or questions.
franco crick answered the question on January 31, 2018 at 14:58
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