Across
- 2. have scales and fins
- 5. the best teacher ever! :)
- 10. internal skeleton
- 11. have a backbone and skeleton
- 13. can make their own food
- 16. have feathers and a beak
- 18. cannot make their own food
- 19. lay jelly-like eggs
- 21. have fur or hair and produce milk for young
Down
- 1. use tube feet to move
- 3. are filter feeders
- 4. external skeleton
- 6. have jointed legs and some have wings
- 7. warm-blooded
- 8. have scales or plates and most lay eggs
- 9. do not have backbones
- 12. a type of segmented worms
- 14. major group of mammals
- 15. cold-blooded
- 17. have soft bodies and a thick muscle foot
- 20. major group of fish