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6. The body plan of sponges is an aggregation of cells built around water?
- A central core
- Water canal system
- Chanocytes
7. What is the name of the group that has calcium carbonate spicules?
- Calcareous sponges
- Silisponge
- Sessile sponges
- Basic sponges
8. Water enters the sponge through
- Choanocytes
- Small pores
- The water canal
9. Spicules are often a key identification features of different sponges
10. Some sponges show radial symmetry but most show no symmetry
11. How many species are sponge are freshwater species?
12. What are Sponges hard skeletal elements called?
- Chanocytes
- Tube feet
- Spicules
- Spines
13. Sponges have a true body cavity
14. Sponges have what kind of body symmetry?
15. Sponges have some specialised cells
16. Sponges have complicated body plans
17. How many major groups of sponge are there?
18. Two of the groups have spicules made of