Across
- 1. most reptile, insects, birds and amphibians lay ____
- 3. mammals produce _____to their young
- 6. insects have ____ legs
- 7. amphibians can also breathe through _______
- 8. insects have ____ body parts
- 10. birds' outer covering
Down
- 2. reptiles and fish outer covering
- 3. amphibians have _______ skin
- 4. fish breathe through _____
- 5. mammals give _____ to their young
- 9. mammals have ______ on their body