One example of animals having a single opening to the outside that serves both as mouth as well as anus is

Q. One example of animals having a single opening to the outside that serves both as mouth as well as anus is

A

Octopus

B

Asterias

C

Ascidia

D

Fasciola

Solution:

Some animals like Fasciola have a single opening which serves as both mouth and anus.
Such animals are said to have an incomplete alimentary canal.
This is also called as blind sac body pain.

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