Vertebrates Review
Across
- 7. animal without a backbone
- 8. birds' skeletal systems are different because they have _____________________
- 10. amphibians have smooth, ________ skin
- 11. birds are covered in _____________
- 14. birds and reptiles both have a _________ in their digestive system
- 15. examples include hawks, vultures, robins, and pigeons
Down
- 1. birds and mammals are _________, or warm-blooded
- 2. mammals are covered in ______ or fur
- 3. animal with a backbone
- 4. vertebrate that has live birth
- 5. mammals, birds, amphibians, and _________ all use lungs at some point in their life cycle
- 6. fish do gas exchange with ____________
- 9. fish and _________ lay jelly-like eggs
- 12. amphibians, reptiles, and fish are __________, or cold-blooded
- 13. reptiles lay leathery ______