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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- CSIR NET
- Life Sciences
Given below are some statements related to lower eumetazoans. Select the INCORRECT statement.
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Eduncle Best Answer
Ctenophores (comb jellies) are diploblastic and radially symmetrical like cnidarians, suggesting that both phyla diverged from other animals very early. Cnidarians have a diploblastic, radially symmetrical body plan altering between Polyp and medusa forms . Most hydrozoans alternate between the polyp and medusa forms, as seen in the life cycle of Obelia. The polyp stage, a colony of interconnected polyps in the case of Obelia, is more conspicuous than the medusa. The single known species in Placozoa phylum, Trichoplax adhaerens, doesn’t even look like an animal. It consists of a simple bilayer of a few thousand cells. Placozoans are thought to be basal animals. So no tissue layer is found in placozoans