Biology, 11.12.2021 04:20 Renabelle5604
Can someone do this for me for 80 points?? I want all of the answers and everything done plz. In this activity, you will prepare a dichotomous key for four organisms, and then analyze the use of such keys. A dichotomous key is a tool used to determine an organism’s identity. Dichotomous keys consist of a series of choices that lead the user to the correct name of a given item. Dichotomous means "divided into two parts." Therefore, dichotomous keys always give two choices in each step.
Estimated time to complete: 30 minutes
Part A
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.
brewer’s yeast (Saccharomyces cerevisiae)
E. coli bacteria (Escherichia coli)
green hydra (Hydra viridissima)
house cat (Felis catus)
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Part B
Question
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.
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2 pt
Part C
Why are dichotomous keys useful in classifying a new species?
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Part D
How could dichotomous keys help evolutionary biologists?
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Part E
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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