Across
- 2. Which amphibian has two tusks sticking up at the end of the nose?
- 3. What provides anchorage for powerful muscles and the teeth?
- 5. who were the earliest group of vertebrates to evolve powered flight?
- 7. what is the bigger vertebrate?
- 9. Which group is considered to have reconstructed jaws of otodus megalodon?
- 12. the pterosaurs wings are ?
- 13. Which group is twenty feet long?
- 14. What is the older name for megalodon?
- 15. the rauisuchians can run as fast as which other animal?
- 16. How many sections are tetrapod limbs divided into?
- 17. Which group is called lobe-finned fishes?
- 21. At the end of what era did the placoderms become extinct?
- 23. What is used to determine the inside of fossils?
- 25. Which modern group have a fossil record dating back to the cretaceous?
- 26. Which new habitat did limbs allow vertebrates to enter?
- 27. in turtle this boney structure was found inside their ribs?
- 28. what is made from the fusion of the ribs and backbone, with an outer layer of bone?
- 29. which finger aided in the formation for the pterosaurs wings?
Down
- 1. In which era did Buettneria live?
- 2. what gender of sharks has claspers on its pelvic fin?
- 4. Numerous tiny prisms of calcium phosphate tied together by a framework of collagen fibers?
- 6. Which group is characterized by two opening behind the eyes?
- 8. Which dinosaur was considered the most dangerous predator?
- 10. the hangenberg event caused which specie to become extinct?
- 11. in which era did the pterosaurs live?
- 18. Which group resembles sting rays?
- 19. Which reptile gave live births?
- 20. what ancient group first appeared during the late triassic?
- 22. who are relatives of crocodiles and alligators?
- 24. What is the largest turtle specie that ever lived?