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One example of animals having a single opening to the outside that serves both as mouth as well as anus is:
Option: 1
Fasciola
Option: 2
Octopus
Option: 3
Asterias
Option: 4
Ascidia
Answers (1)
Fasciola(or) liver fluke (or) flatworm is the phylum of Platyhelminthes. It has a single opening used for the ingestion of food and excretion of food. The correct option is a.
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