Across
- 1. example for Nematoda
- 3. has single opening
- 6. three embryonic cell layers
- 8. jointed feet
- 9. some mollusca are
- 11. flexible spine
- 12. example for Arthropoda
- 14. is the external skeleton that supports and protects an animal's body
- 15. example for chordata
- 16. example for Cnidaria
- 18. they are ecosystem engineers
- 20. example for echinodermata
Down
- 2. attack pest
- 4. example for Platyhelminthes
- 5. means spiny skinned
- 7. singing cells
- 10. flatworms are free living
- 13. it means flatworms
- 17. long have round snout
- 19. example for Mollusca