Across
- 2. blooded temperature stays the same
- 5. vertebrate with gills and lays eggs
- 6. having a backbone
- 8. having no backbone
- 11. has no tubes and gets water from around it
- 12. blooded temperature changes with environment
Down
- 1. has hair and feeds young milk
- 3. lives part of life on land and part in water
- 4. largest group of classified organisms
- 7. vertebrate with scaly skin and lays eggs
- 9. having tissue to transport water and nutrients
- 10. vertebrate with feathers and warm blooded