Across
- 3. Free-swimming stage of cnidarian life cycle
- 4. Jelly like matrix surrounding sponge cells
- 5. Resting stage of a larva
- 6. A body arranged in groups of five
- 12. Covering of a pupa of a butterfly
- 14. Glands used excretion in crustaceans
- 15. A group of joint legged animals
- 16. Group of spiny skinned animals
- 18. A vestigial circulatory system
- 19. A series of calcium plated modified into spines
Down
- 1. Claws in crustaceans
- 2. Structures that look like suction cups and are used for feeding and locomotion
- 4. Cutting mouth parts
- 6. A chemical or hormone produced to attract another member of the same species
- 7. Air tubes in insects
- 8. A bulb like structure attached to the tube feet
- 9. Excretory structures in insects
- 10. The ability to grow back body parts
- 11. Breathing pores of insects
- 13. A radical change in body form
- 17. Chewing mouth parts