NEET 2000 Biology question

Which of the following animals have scattered cells with cell - tissue grade organisation :

(1)Sponge
(2)HydraCorrect
(3)Liver fluke
(4)Ascaris

Answer: (2)

Solution

The cell-tissue grade of organisation, in which cells of a kind are loosely arranged in layers or aggregated but do not form true organs, is the level found in the coelenterates (Cnidaria) such as Hydra: the cells are organised into the ectoderm and endoderm, with scattered cells (e.g. nerve

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Question ID VK-088722