Across
- 2. A body plan where left and right sides are mirror images.
- 5. A flexible, supportive tissue found in joints and certain skeletal structures.
- 9. Eggs with protective layers that allow development outside of water.
- 10. A body plan that cannot be divided into matching halves.
- 11. An organ that connects a developing offspring to its mother, providing nutrients and oxygen.
- 12. An animal with a backbone or spinal column.
- 15. A hard, protective outer layer supporting an animal’s body.
- 16. Able to maintain a constant body temperature through internal processes.
- 20. Organs that produce milk to feed offspring.
Down
- 1. An organism that possesses both male and female reproductive structures.
- 3. A network of fluid-filled tubes used for movement and feeding in some marine animals.
- 4. An internal framework that supports and protects the body.
- 6. An organ that helps aquatic animals maintain buoyancy.
- 7. An animal lacking a backbone or spinal column.
- 8. A body plan where parts are arranged evenly around a central axis.
- 13. Relating to life at the bottom of a body of water.
- 14. Relying on external sources to regulate body temperature.
- 17. A free-swimming, bell-shaped life stage of some aquatic creatures.
- 18. A form of reproduction where a new organism grows directly from the parent.
- 19. A tube-shaped, often stationary life stage of certain aquatic animals.
- 21. The process of shedding an outer layer to allow growth.