Across
- 7. segmented body parts; earthworms
- 10. sponges
- 11. are flat and ribbon-like organisms; flatworms
- 15. with backbone
- 16. long, cylindrical, and slender body; Ascaris
Down
- 1. radial symmetry; starfish
- 2. jawed and cartilaginous fish
- 3. exoskeleton made from chitin; spiders
- 4. bony fish
- 5. dry skin; lays eggs
- 6. no backbones
- 8. produce milk; mammary glands for milk; hair or fur
- 9. soft-bodied and covered with shell; snail
- 12. lays eggs; wings and feathers; warm-blooded
- 13. tentacles and stinging cells; jellyfish
- 14. is cold-blooded; moist skin; lives on land and in water