Irish Life Science C. 16 Vertebrates

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Across
  1. 2. group of invertebrate chordates shaped like a blade
  2. 4. group of eggs laid by a female reptile
  3. 5. phylum of all vertebrates
  4. 9. part of the egg that provides nutrients
  5. 10. type of egg in reptiles that holds fluid
  6. 12. group of fish like sharks without bones
  7. 14. means double life (land and water)
  8. 15. along with mammals they are endotherms
  9. 17. describes a species that no longer exists
  10. 21. describes things like snakes that are meat eaters
  11. 24. describes the most primitive group of fish
  12. 26. means back
  13. 28. rare group of reptiles that only inhabit New Zealand
  14. 29. type of fertilization in fish
  15. 34. substance softer than bone found in many vertebrates
  16. 35. warm blooded or can control their body temperature
  17. 37. smooth and moist and can be used to get oxygen in amphibians
  18. 38. along with fish and amphibians they are ectotherms
  19. 39. like a crocodile but with a more rounded snout
  20. 41. have a backbone
  21. 43. _____ finned fish probably gave rise to amphibians
  22. 44. word to describe snakes like bullsnakes that squeeze their prey
  23. 45. organs in fish that can get oxygen from water
  24. 46. newly hatched amphibian
  25. 48. feature that distinguishes turtles and tortoises
  26. 49. feature of chordates that is sometimes only present in the embryo
  27. 50. type of rattlesnake in Nebraska
  28. 51. means front
Down
  1. 1. line in fish that allows them to sense vibrations
  2. 3. describes animals that are active at night
  3. 4. legless amphibians
  4. 6. describes lamprey that live off of a host
  5. 7. substance in rattle snakes that kills prey
  6. 8. word to describe the class Osteichthyes like trout and tuna
  7. 11. becomes the spine in vertebrates
  8. 13. part of the egg that stores the embryo’s waste
  9. 16. describes the nerve chord location in chordates
  10. 18. don’t have a backbone
  11. 19. _____ finned describes most bony fish
  12. 20. means bottom
  13. 22. means egg laying in fish
  14. 23. water with no salt
  15. 25. describes hagfish that eat dead things
  16. 27. most common group of reptiles
  17. 30. in the same class as rays and skates
  18. 31. amphibians that are sometimes confused with lizards
  19. 32. cold blooded and have to get heat from the environment
  20. 33. water with salt
  21. 36. describes how snakes like garters bite and kill prey
  22. 40. similar to frogs but can live farther from water
  23. 42. describes a species that still exists
  24. 46. group of invertebrate chordates that look more like a sponge or jellyfish
  25. 47. sharks have to swim constantly because they don’t have a swim _____