Across
- 3. a time where a animal sleeps to escape
- 4. an organism with multiple cells
- 5. a chemical that animals use to communicate
- 9. a rhythm controlled by a biological clock
- 16. an organism with a nucleus
- 17. a collection of similar cells
- 18. the interaction among animals
- 20. when part of an organism breaks off
- 22. a behavior inherited through genes
- 26. when a fertilized egg divides into many
Down
- 1. an animal's natural cycle
- 2. an animal without a backbone
- 6. to travel from one place to another
- 7. fixed object a animal uses to find its way
- 8. summer hibernation
- 10. an area that is occupied by a animal
- 11. behaivior that has been learned
- 12. a organism that eats others
- 13. visual communication
- 14. special behaiviors that help animals find a mate
- 15. the purpose why animals do things
- 19. an animal with a backbone
- 21. a signal from one animal to another
- 23. an organism at an early stage
- 24. a group of tissues
- 25. groups lions live in