Across
- 2. Have a rudimentary structure in the collar region called stomochord,
- 6. Flatworms, including tapeworms and flukes; many are parasitic.
- 8. Segmented worms like earthworms and leeches.
- 9. Animals with a backbone, including fish, amphibians, reptiles, birds, and mammals
- 10. Simplest animals with no true tissues or organs.
- 11. Have jointed legs and are characterized by exoskeleton and segmented body.
Down
- 1. Have a soft body, often with a hard shell.
- 3. Roundworms; many are free-living, while some are parasitic.
- 4. commonly known as sea walnuts or comb jellies
- 5. Possess radial symmetry as adults and have a water vascular system.
- 7. Have specialized stinging cells called cnidocytes.