Porifera & Cnideria

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Across
  1. 2. Reproduction with only one parent
  2. 6. Method of respiration used by Porifera and Cnidarians
  3. 8. cells that build spicules and digest food
  4. 10. Brain, staghorn and star coral belong to this group of coral
  5. 12. Stinging cells in Cnidarians
  6. 16. Animals that are both male and female
  7. 17. Coral is made of calcium ___________
  8. 18. spiny structures that form the skeleton of sponges
Down
  1. 1. large hole in the top of the sponge
  2. 3. algae that forms symbiotic relationship with coral
  3. 4. Coral _______ happens when stressed by environmental conditions
  4. 5. Sea-fan, whip and plume coral belong to this group of coral
  5. 7. collar cells in sponges (digest food, move water)
  6. 9. Phylum containing jellyfish and coral
  7. 10. Another word for not moving
  8. 11. Organisms that get their energy by eating others
  9. 13. Phylum containing sponges
  10. 14. fibers of protein that make up soft sponges
  11. 15. Type of symmetry that is round