character: Euglena
topic: Photosynthetic Protists in Aquatic Ecosystems
grade: 9
subject: Biology
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character: Chlamydomonas
topic: Green Algae and Photosynthesis
grade: 9
subject: Biology
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character: Dinoflagellates
topic: Role in Marine Ecosystems
grade: 9
subject: Biology
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character: Diatoms
topic: Importance in Food Chains
grade: 9
subject: Biology
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