Question
Name some of the solar energy devices.
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| Body cavity | Germ Layer | Phylum |
| Absent | _____________ | Porifera |
| Absent | Triploblastic | _____________ |
| Pseudocoelom | _____________ | Aschelminthes |
| Present | _____________ | Arthropoda |
| Phylum | Characteristics |
| (1) Porifera | (a) Tunic |
| (2) Coelenterata | (b) Collar cells |
| (c) Tentacles bearing cnidoblasts | |
| (d) Mantle |