character: Cryptoclidus
topic: Morphological features of marine reptiles
grade: 12
subject: Biology
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character: Plesiosaurus
topic: Comparison of morphological features in marine reptiles
grade: 12
subject: Biology
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character: Ichthyosaurus
topic: Adaptations of marine reptiles for aquatic life
grade: 12
subject: Biology
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character: Mosasaurus
topic: Evolutionary traits of marine reptiles
grade: 12
subject: Biology
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