Across
- 1. large opening in sponge
- 5. sexes in separate organisms
- 6. simplest sponge body form
- 7. fixed in one place
- 9. both sexes in one organism
- 12. whip-like tails for movement
- 13. hard support structure in sponges
- 14. drifting microscopic organisms
- 15. bottom dwelling organism
- 17. sponge body form with folds
- 18. tiny pores for water entry
- 21. able to shorten or tighten
Down
- 2. most complex sponge body form
- 3. bell-shaped body form, mouth down
- 4. Feeder eats by straining particles from water
- 8. flexible protein fibers in sponges
- 10. new organism grows from parent
- 11. having both male and female organs
- 14. free-swimming cnidarian larva
- 16. central cavity in sponge
- 19. immature form before adult
- 20. tubular body form, mouth up