Find reliable reference information to help answer these QUESTIONS about ostracods and their locomotion:

1) What specific structures help to propel the ostracod through water?
2) Explain how the shape of the ostracod exoskeleton is advantageous for effective swimming and for avoidance of predators?

RELATED LINKS: 
Ostracod background information
Fossil ostracods (Paleozoic, Devonian)

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