Which among the following organisms have an incomplete digestive system?

Fasciola

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Octopus

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Asterias

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Ascidia

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Solution

The correct option is A Fasciola
Fasciola (Liver fluke) belongs to the phylum Platyhelminthes. It has an incomplete digestive system with a single opening both for ingestion and egestion.

Octopus belongs to the phylum Mollusca. Asterias belongs to the phylum Echinodermata and Ascidia belongs to the phylum Chordata. All of them have a complete digestive system with a mouth for ingestion and anus for egestion.

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