What is the Difference Between Dichotomous Key and Taxonomic Key?

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A dichotomous key and a taxonomic key are both tools used to identify organisms. However, there are some differences between the two:

  • Purpose: A taxonomic key is a tool used to identify a specific organism, while a dichotomous key is a type of taxonomic key that consists of paired statements to identify an unknown organism.
  • Choices: Dichotomous keys always have two choices, which are mutually exclusive. Taxonomic keys, on the other hand, may have two or more choices.
  • Types: There are several types of taxonomic keys, including dichotomous keys and polyclave keys. Polyclave keys are generated using computerized programs and allow users to enter the key at any point, while dichotomous keys do not.
  • Classification: Taxonomic keys are used to classify organisms based on their characteristics, while dichotomous keys are used to identify individual organisms.

In summary, a taxonomic key is a broader term that encompasses various types of identification tools, including dichotomous keys. Dichotomous keys are a specific type of taxonomic key that uses paired statements and always offers two choices at each step in the identification process.

Comparative Table: Dichotomous Key vs Taxonomic Key

Here is a table comparing the differences between a dichotomous key and a taxonomic key:

Feature Dichotomous Key Taxonomous Key
Definition A tool used to identify and classify organisms based on their physical characteristics, consisting of paired statements with two choices. A simple tool used to identify a specific object, consisting of hierarchical charts that place each category in a series of classes above and below others.
Structure Binary choices, no hierarchy. Hierarchical structure, with attributes organized into fewer groups with more specific attributes.
Types Dichotomous keys are a type of taxonomic key. There are three types of taxonomic keys: dichotomous key, polyclave key, and morpic key.
Usage Commonly used in the field of biology and other sciences to identify and classify organisms. Used to guide researchers towards the known name of an organism and can be developed for specific objects, regions, or groups of organisms.

In summary, a dichotomous key is a tool with paired statements and two choices, used to identify and classify organisms based on their physical characteristics. On the other hand, a taxonomic key is a hierarchical tool used to identify specific objects and can have two or more choices. Dichotomous keys are a type of taxonomic key, while taxonomic keys encompass a broader range of identification tools.