Across
- 1. Cells that perform ingesting and digesting
- 5. The back end
- 8. The top of a animal
- 11. The bottom of the animal
- 12. decomposing organic material
- 13. An animal with spherical symmetry
- 14. cell that develops other cells
- 15. The front end
- 18. Symmetry where animals are sphere shaped
- 19. Large openings in the sponge
- 20. Symmetry where animals are symmetrical from any pane
Down
- 2. Needle like supports made of silica or chalk
- 3. Type of symmetry where animals have front,rear,upper,and lower ends
- 4. Thin layer of jelly-like material
- 6. Animals without a backbone
- 7. Animals that have no definite shape
- 9. Part of the collar cell that engulfs food
- 10. The production of energy through photosynthesis
- 16. Sponge's feeding process
- 17. Simplest of all multicellular animals