Answer:
(i)
Diploblastic animals with tissue level organisation in the body.
(ii) The body is radially symmetrical.
(iii) The body bears tentacles supplied with special
stinging cells called cnidoblasts.
(iv) There is a cavity in the body.
(v) Body is made of two layers of cells.
(vi) Simple gonads without gonoducts are present.
(vii) Reproduction is usually asexual (budding) in polyp
form and sexual in medusae form.
(viii) They show polymorphism.
Examples: Hydra, Obelia and jelly fish.
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