Across
- 1. - rigid rod that runs the length of the body in some animals
- 4. - any animal with a notochord
- 6. - any animal that has a backbone
- 9. - response of a plant to gravity
- 10. - trait of an organism that can be divided into two identical halves
- 13. - last embryonic cell layer to evolve
- 14. - response of a plant to light
- 16. - any trait that has evolved to help an organism survive and reproduce under certain conditions
- 17. - trait of an organism whose body is divided into multiple parts
- 20. column - another term for backbone
Down
- 2. - phylum in which all modern vertebrates are placed
- 3. - suspension of growth and development in a plant during periods of extreme coldness and dryness
- 4. - fluid-filled body cavity completely enclosed by mesoderm
- 5. - diploid cell that forms when a sperm and an egg fuse
- 7. - plant that grows on other plants rather than in soil
- 8. - any turning toward or away from a stimulus in the environment
- 11. - process in which two gametes fuse into one cell
- 12. - any animal that produces eggs with waterproof membranes
- 15. - plant that is adapted to very dry conditions
- 18. - domain in which the Animal Kingdom is placed
- 19. - distinct juvenile form that many animals go through before becoming an adult