Sea anemone belongs to which class?

Which of the following symmetry is found in adult sea-anemone?

Corals belong to the phylum

Phylum $Coelenterata$ (Cnidaria) exhibits which level of body organization?

Which of the following animals exhibits a diploblastic and acoelomic condition?

Which of the following cells are present only in the epidermis of Hydra?
$(A)$ Interstitial cells
$(B)$ Cnidoblasts
$(C)$ Sensory cells
$(D)$ Germ cells