Zoology notes

1. a large aperture in a sponge through which water is expelled.
5. a plant or invertebrate animal having the male and female reproductive organs in separate individuals.
6. a sponge of a grade of structure of the simplest type
7. an organism fixed in one place
9. a plant or invertebrate animal
12. hair-like appendages that help cells move
13. small, needle-like structural components found primarily in sponges
14. the small and microscopic organisms drifting or floating in the sea or fresh water
15. anything that occurs on or in the bottom of a body of water
17. a sponge of intermediate structure
18. small openings or pores in the body of a sponge that allow water to enter and exit
21. capable of or producing contraction.

2. a sponge of the most complex structure
3. the free-swimming, bell-shaped body form of a cnidarian like a jellyfish
4. feeder an aquatic animal) feeding by filtering out plankton or nutrients suspended in the water
8. a flexible protein that makes up the fibrous skeleton of most sponges
10. a plant having or developing buds.
11. a plant or animal with both male and female reproductive organs
14. a free-swimming, larval stage of cnidarians, such as jellyfish, corals, and sea anemones
16. the large, central cavity of a sponge that allows water to flow through and facilitates
19. the active immature form of an insect,
20. an abnormal growth of tissue that can occur in various parts of the body, including the colon