A) earthworm
B) Hydra
C) Planaria
D) none of these.
Correct Answer: D
Solution :
: Coelomoduct is a mesodermal ciliated duct (its lumen is never intracellular) originating in the coelom and growing outwards from the gonad or wall of the coelomic cavity of fuse with the body wall. Coelomoducts provide a means of exit for gametes and waste products; and in higher animals they are specialized as oviducts etc. Earthworm (class oligochaeta, phylum annelida) - excretion by nephridia. Hydra (class hydrozoa, phylum coelenterata) - excretion by general body surface. Planaria (class turbellaria, phylum platyhelminthes) - excretion by flame cells.
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