Across
- 5. - a form of asexual reproduction
- 9. - the immature, mobile, free living stage of an animal going through a dramatic tranformation
- 10. - an organism that possesses both male and female reproductive organs or tissues, functioning as both sexes
- 13. -organisms that live on or in the bottom of aquatic sediment environments
- 14. - large, central cavity or canal within the body of a sponge
- 15. - simplest type of sponge body form
- 16. - an organism that is permanently attached to a substrate
- 17. - a genius of calcareous sponges
- 19. -small needle like structure of hard material
- 20. - attached, cylindrical, sedentary life stage of certain animals
- 21. - small, numerous openings found on the surface of sponges
Down
- 1. - free swimming, umbrella shaped stage in the life cycle of certain cnidarians
- 2. - plant or invertebrate animal having both male & female reproductive organs in the same individual
- 3. - an aquatic organism that obtains food
- 4. - long whip like appendages that extend from the surface of a cell & provides motility
- 6. - any structure or organism that has the ability to shrink or cause a contraction
- 7. - most complex type of canal system found in sponges
- 8. - a characteristic of certain species that have unisexual individuals
- 11. -tiny aquatic organisms like bacteria, or animals that drift in bodies of water
- 12. - the large, excurrent opening on a sponge's body
- 18. - a flexible fibrous protein that forms the structural skeleton of many sponges