I want to know the answer to the following question:
What differentiates placozoans from the ctenophora and the cnidaria?
All the background I'm provided with is that "Among the other phyla, the Ctenophora and the Cnidaria, which includes sea anemones, corals, and jellyfish, are radially symmetric and have digestive chambers with a single opening, which serves as both the mouth and the anus.". Is that enough to answer the question?
Answer: no