Choose the common characters shown by the animals of classes Scyphozoa and Anthozoa
A. Mesoglea is non-cellular with amoebocytes
B. Cnidocytes occur in ectoderm and endoderm
C. Germ cells are derived from endoderm
D. Coelenteron is undivided
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Focus on germ layer origins and body cavity structure in cnidarians.
In Scyphozoa and Anthozoa, germ cells are derived from endoderm, and the coelenteron remains undivided. These features are typical of cnidarians in these classes.