Information about the four organisms can be found on the Internet. Use credible websites to find answers to the questions you developed in Part A. Based on this data, draw your own dichotomous key.

Based on the key you created, do you think some of the organisms are more closely related than others? Explain your answer.

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Part 1:
A dichotomous key works on the principle of asking yes-or-no questions about the organism. To identify it, the answers for that organism are then compared to existing organisms to identify it. Prepare a list of four to five questions about each of the organisms listed below to help you create your own key. For each question, make sure the answer isn’t the same for all four organisms. For example, "Does the organism have cells?" would be an inappropriate question because all the organisms have cells.

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1. Brewer’s yeast (Saccharomyces cerevisiae)
2. E. coli bacteria

A dichotomous key can be created using distinguishing traits of organisms such as brewer's yeast and E.coli. The key can reveal how closely related the organisms are by comparing their shared characteristics. In the provided example, they're likely not very closely related as they belong to different domains of life.

Explanation:

To create a dichotomous key based on information about brewer’s yeast (Saccharomyces cerevisiae) and E. coli bacteria, one might use distinguishing features of these organisms to ask yes-or-no questions. For example, questions could focus on the organism's characteristics such as their habitats, reproductive methods, and type of cells (eukaryotic or prokaryotic).

After creating the dichotomous key, the relationship between the organisms can be assessed. The dichotomous key might reveal if some organisms are more closely related than others based on their shared characteristics. For instance, if two organisms share more key features determined by the dichotomous key, they could be considered more closely related genetically.

Note that the organisms being compared here, Saccharomyces cerevisiae and E. coli, belong to different domains of life (Eukarya and Bacteria respectively), hence are not very closely related.

Learn more about Dichotomous Key here:

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aleahmch aleahmch · Answer 2 · 2024-12-26T07:15:44-05:00

Answer:

This may not exactly align with your answer but here's the key and I wrote for Part E:

Explanation:

Part E: Yes, I think that there are some closely related species of organisms that cannot be identified with a dichotomous key. Dichotomous key is used to classify objects or organisms based on its physical characteristics. Because of that limitation, there are species that may be related according to the dichotomous key but are in fact not or its relation is very minimal whereas there are organisms that may seem unrelated based on their physical characteristics but are actually from the same ancestors.