Across
- 2. Cold-blooded animals
- 3. Organism with both male and female reproductive organs
- 4. Free-swimming body form of cnidarians
- 5. System used by echinoderms for movement and feeding
- 7. Body has left and right sides
- 8. No symmetry in body shape
- 9. Flexible tissue found in sharks
- 13. Organ that helps fish float or sink
- 15. Sessile body form of cnidarians
- 16. Organ that provides nutrients to developing baby
- 18. Warm-blooded animals
- 20. Internal skeleton
Down
- 1. Animal without a backbone
- 4. Shedding of exoskeleton to grow
- 6. Animal with a backbone
- 10. Eggs with protective covering for land life
- 11. Hard outer covering of arthropods
- 12. Produce milk for young
- 14. Body parts arranged around a center
- 17. Asexual reproduction where a new organism grows off parent
- 19. Living on the ocean floor