Across
- 2. Vertebrates have this.
- 4. an example of birds
- 7. an example of mammals
- 8. The legs of arthropods have several ---.
- 10. Amphibians have --- skin.
- 11. The skin of reptiles is dry and ---.
- 12. Fish live their whole lives in ---.
Down
- 1. the largest group of arthropods
- 3. vertebrates with feathers
- 5. How many groups are animals divided into?
- 6. animals without backbones
- 9. an example of amphibians