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Archaepteryx 1 st bird - PowerPoint PPT Presentation

Reptiles and Birds

Reptiles and Birds. REPTILE FACTS. first to adapt completely to land. REPTILE FACTS. scaly skin legs lower (not at 90 o angles) claws ectotherms. REPTILE FACTS. most have three- chambered hearts some have four-chambered hearts which allow for more energy (O 2 blood separate).

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Archaepteryx 1 st bird - PowerPoint PPT Presentation

Reptiles and Birds