A student is trying to differentiate between Porifera and Cnidaria. Which combination of features correctly distinguishes these phyla? 
Porifera Cnidaria
1. Cellular level of organization, ostia present Tissue level, cnidoblasts present
2. Tissue level, choanocytes present Organ level, nematocysts present
3. Diploblastic, spongocoel present Triploblastic, gastrovascular cavity present
4. Radial symmetry, hermaphrodite Bilateral symmetry, unisexual
Subtopic:  Phylum Porifera | Phylum Coelenterata |
Level 4: Below 35%
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