Across
- 2. phylum of sponges
- 3. full body cavity
- 5. shrap structures in sponges used for support
- 7. outside layer
- 9. upward facing cnidarian
- 11. egg +sperm = zygote
- 14. has both egg and sperm in one body
- 16. three cell layers form (different jobs)
- 17. one line of symmetry
- 19. whiplike structure that waves to create currents
- 20. movement
- 21. partial body cavity
- 23. study of animals
- 24. no body symmetry
Down
- 1. cnidarians use this for many things
- 4. down facing cnidarian
- 6. sensory organs are at anterior end
- 8. middle layer
- 10. study of life
- 12. any trait that is made better for environment
- 13. wheel symmetry
- 15. 32 cell stage
- 18. no body cavity
- 22. inner layer