Across
- 4. the central cavity of a sponge's bod
- 6. the study of organisms that live in, on, or near the bottom of bodies of water
- 9. having both male and female reproductive organs in the same individual
- 11. a larval form of cnidarians, such as jellyfish, corals, and sea anemones, that is free-swimming and ciliated
- 13. small openings or pores in the body of an animal or in an organ within the body
- 14. a sexual system where individuals are either male or female, and do not change throughout their lives
- 15. mall, hard, needle-like structures that form the skeletal elements of various marine and freshwater invertebrates, such as sponges
- 16. a type of invertebrate animal that is part of the phylum Cnidaria
- 17. a form of asexual reproduction where a new individual develops from a small outgrowth or "bud" that grows on the body of a parent organism
Down
- 1. play a key role in the oceanic food web
- 2. animals that are permanently attached to a surface and are unable to move around
- 3. organisms that have both male and female reproductive organs, and can produce both male and female gametes
- 5. the large opening on a sponge through which water exits the body
- 7. Feeder
- 8. a whip-like, hair-like structure that protrudes from a cell and functions as the primary organelle for locomotion
- 9. the free-swimming, bell-shaped body form found in many cnidarians
- 10. a genus of small, tube-shaped calcareous sponges belonging to the family Sycettidae
- 12. a type of sponge with a simple body plan and a distinct water circulatory system
- 15. a flexible, fibrous material that makes up the skeleton of most sponges