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Campbell Biology | 10th Edition | ISBN: 9780321775658 | Authors: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
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This micrograph shows a single-celled eukaryote, the ciliate Didinium (left), about to

Chapter 28, Problem 10

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QUESTION:

This micrograph shows a single-celled eukaryote, the ciliate Didinium (left), about to engulf its Paramecium prey, which is also a ciliate. Identify the eukaryotic supergroup to which ciliates belong and describe the role of endosymbiosis in the evolutionary history of that supergroup. Are these ciliates more closely related to all other protists than they are to plants, fungi, or animals? Explain.

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QUESTION:

This micrograph shows a single-celled eukaryote, the ciliate Didinium (left), about to engulf its Paramecium prey, which is also a ciliate. Identify the eukaryotic supergroup to which ciliates belong and describe the role of endosymbiosis in the evolutionary history of that supergroup. Are these ciliates more closely related to all other protists than they are to plants, fungi, or animals? Explain.

ANSWER:


Ciliates are a supergroup of eukaryotes belonging to the Alveolata group. Endosymbiosis – which is the incorporation of another living organism into another's cell- played an important role in the evolutionary histor

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