character: Elasmosaurus
topic: Adaptations of elongated neck in marine reptiles
grade: 12
subject: Biology
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character: Plesiosaurus
topic: Comparison of neck adaptations in marine reptiles
grade: 12
subject: Biology
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character: Cryptoclidus
topic: Morphological features of marine reptiles
grade: 12
subject: Biology
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character: Pliosaurus
topic: Differences between pliosaurids and plesiosaurids in marine adaptation
grade: 12
subject: Biology
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