algae & invertebrats

2. the arrangement of body parts around a point or central axis
5. a marine animal with spiky spherical symmetry
7. simple nervous system
10. an organism that has the ability to produce both eggs and sperm
13. A thin layer of jelly-like material situated between the outer and inner layers
14. bottom side of an organism
16. organisms that drift or swim weakly
17. silica or chalk based needle like with the purpose of defense
18. attached to a solid surface throughout their adult life
20. a phylum of marine invertebrates, commonly known as comb jellies
21. top side of an organism
22. symmetry of sponges

1. an explosive cell containing one large secretory organelle called a cnidocyst that can deliver a sting to other organisms
3. the ability of an organism to regrow missing body parts
4. responsive to gravity and part of the nerve net
6. animals without a backbone
8. hind end of an organism
9. commonly known as "sponge"
11. front end of an organism
12. no defined shape or pattern
15. producing on your own
19. Sac-like animals that have radial symmetry, two tissue layers, stinging cells, and no organs