Vertebrates

12345678910111213141516171819202122232425
Across
  1. 5. live in water and on land
  2. 8. oviparous and reliant on mother's milk
  3. 10. have a constant internal temperature
  4. 11. cannot control their body temperature
  5. 16. process of radical transformation
  6. 17. egg laying animals
  7. 19. embryo develops inside the mothers body
  8. 22. birds with webbed feet
  9. 23. vertebrates with gills, scales and fins
  10. 24. perching birds
  11. 25. Cartilaginous fish such as sharks
Down
  1. 1. term for the variety of life
  2. 2. have placenta that nourishes the fetus
  3. 3. amphibian classification of newts
  4. 4. mammals that only eat meat
  5. 6. birds with strong legs and beaks
  6. 7. amphibian classification of frogs
  7. 9. Bony fish such as perch
  8. 12. group of reptiles containing tortoises
  9. 13. group of reptiles containing geckos
  10. 14. contains the vocal cords
  11. 15. lived millions of years ago
  12. 18. tapered body with fins
  13. 20. live embryo develops in mother's pouch
  14. 21. eggs develop inside the mother