The organism’s DNA is sequenced and compared to the DNA sequences that are listed in the dichotomous key. How is a dichotomous key used? The organism is compared to paired pictures of organisms until a match is found in the key. How is a dichotomous key used the organism is compared? Why is the dichotomous key important?Īnswer and Explanation: The importance of the dichotomous key is that it lets experts and non-experts alike to identify species based on characteristics or behaviors. In many environments, this is sufficient for complete identification of the species. Dichotomous key is very useful for identifying an organism as a member of a single, closely related group of organisms. What is the purpose of using a dichotomous key?ĭichotomous keys are most commonly used to identify plant and animal species based on their characteristics. They can be presented as a table of questions, or as a branching tree of questions. Dichotomous keys use questions to which there are only two answers. ![]() A key will usually ask questions based on easily identifiable features of an organism. Keys are used to identify different species. 24 Why do biologists prefer to identify an organism by its scientific name? Why are dichotomous keys useful in classifying a new species?ĭichotomous keys are very useful because they allow non-expert users to identify organisms by directing them to look at the known, important organisms.
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