Which of the following is diploblastic ?
Fasciola
Pheretima
Palaemon
Hydra
Diploblastic -
Animals in which body cells are arranged in two embryonic layers- an outer ectoderm and an inner endoderm, with an intervening undifferentiated mesoglea.
- wherein
Eg. Coelenterates, poriferans.
Body wall of hydra is diploblastic