Across
- 3. with a backbone
- 4. have hard scales and live on land
- 7. skin is thin so they can breathe
- 9. does not have tubes, roots, stems, and leaves
- 12. scientists who study plants
Down
- 1. covered in either fur or hair
- 2. does not have a backbone
- 5. have feathers and use a beak as teeth
- 6. seed plants, ferns, and mosses
- 8. vascular nonvascular
- 10. has tubes, roots, stems,and leaves
- 11. covered in scales and has fins to swim