Across
- 4. Class that contains animals with more than one pair of antennae
- 6. Class that includes sharks, rays, and skates with a cartilaginous skeleton
- 10. Type of animal without a backbone
- 11. Class that is characterized by the presence of hair
- 14. Class that contains scales and leathery eggs
- 16. Class that requires moist habitats, but can also live partially on land
- 18. Phylum that contains asymmetrical animals such as sponges
- 19. Class that contains jawless vertebrates
- 21. Phylum that contains organisms with bilateral symmetry and segmentation
- 22. Phylum that is the most abundant of the animal phyla
- 23. Class that evolved from reptiles and has feathers
Down
- 1. Phylum that contains animals with flattened bodies (no segments)
- 2. Class of arthropods that does not contain antennae
- 3. Type of body plant that has a digestive system with one opening
- 5. Phylum characterized by muscular foot, mantle, and shell
- 7. Type of skeleton that provides an extra layer of protection on the outside of the animal
- 8. Phylum that contains tentacles and a soft body
- 9. Scientific term for a group or classification level
- 12. Class that contains animals with one pair of antennae
- 13. Type of symmetry found in sea cucumbers and sea urchins
- 15. Phylum that contains starfish (bony skeleton)
- 17. Class that contains two pairs of legs per body segment
- 20. Class that contains one pair of legs per body segment