A scientist is studying an organism. After studying he found that the animal has a cavity which originated from blastocoel. This cavity is present between body wall and gut wall, and it is not lined by mesoderm. Identify the animal on the basis of given information?
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• A cavity derived from the blastocoel and lying between the body wall and gut is a pseudocoelom. Pseudocoelomates include Nematoda (roundworms) such as Ancylostoma.
• Planaria (Platyhelminthes) acoelomate (no body cavity).
• Fasciola (liver fluke, Platyhelminthes) - acoelomate.
• Spongilla is an acoelomate.
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