Can it produce its own food?
Yes: Go to 3
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Is the organism unicellular?
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Yes: It is a yeast
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No: It is a hydra
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No: Go to 4
Does the organism have hair?
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Yes: It is a cat
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No: Go to 9
Is the organism unicellular?
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Yes: It is a bacteria
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No: The organism cannot be identified using this key.
To use this key, you start at the first question and follow the instructions based on the answer. For example, if the organism can produce its own food, you would go to question 2. If the organism is unicellular, you would go to question 4. And so on, until you identify the organism.