Across
- 2. Reptiles inhale by contracting the rib cage
- 4. This keeps reptiles from drying out
- 6. Lives in water
- 9. Reptiles are __
- 12. An amniotic egg is covered with a protective
- 13. Birds have a ___ chambered heart
- 16. Reptiles have legs under their bodies instead of their sides
- 17. Birds have __ fertilization
- 20. Have webbed feet to aid in moving through the water
- 21. Only two species now exist
- 23. Live on land
- 25. Some reptiles keep eggs in their bodies until they hatch
- 26. A membrane that surrounds a developing embryo
- 27. Are nocturnal, with large eyes and sharp talons on their feet
- 28. Optic lobes and cerebellum of reptiles are larger than those of amphibians
- 29. Birds have a __ or bill instead of teeth
- 30. Birds have __ instead of arms
Down
- 1. Has a long v-shaped snout
- 3. Birds are __ blooded
- 5. Reptiles have __ fertilization
- 7. Helps to coordinate movement & balance during flight
- 8. Some reptiles are herbivores, and some are carnivores
- 10. The outermost membrane off the egg is the
- 11. Birds are __
- 14. Have jointed jaws that enable them to eat large prey
- 15. Have feet adapted for perching on in stems and twigs
- 18. Has a wide u-shaped snout
- 19. Amphibians have __ fertilization
- 22. Have vertebrae and ribs fused to a carapace
- 24. Use their wings as flippers to swim