Across
- 3. what is the birds outer covering?
- 5. what animal group does the snake belong to?
- 7. frogs are ______.
- 9. fish have ____.
- 10. amphibians have ___skin.
- 11. what animal group does the shark belong to?
- 13. _____ have no backbone.
Down
- 1. fish lay ____.
- 2. crabs have a pair of feelers.
- 4. _____feed on their mothers' milk.
- 6. parrots are ____.
- 8. all____ have three pairs of legs.
- 12. mammals have _____/fur.