Across
- 6. can be divided in half
- 10. group of animals with jointed apendeges
- 11. the effort to define the boundries between the various created kinds of animals
- 13. temp is determand by enviorment
- 14. without a backone
- 15. lives in water and on land
- 18. group of animals with stining tenticals
- 19. long soft bodied animals
- 20. have only one opining
Down
- 1. group of animals with a soft bodies and shells
- 2. a mammal with a pouch in witch to raise its young
- 3. can regulate its body tempiture
- 4. digustive tracts have two opinings
- 5. a living internal support system
- 7. skeleton on the outside of animals
- 8. group of animals with no symitry
- 9. mammal has a placenta
- 12. a bacbone
- 16. a flexible rod found in chordate animals
- 17. group of animals with spiney skin