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Question

Which of the following animals have a single opening that serves as both mouth and anus?

A
Fasciola
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B
Octopus
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C
Asterias
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D
Ascidia
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Solution

The correct option is D Fasciola
Out of the options given, Fasciola is the animal with a single opening working as both mouth and anus. It is commonly called liver fluke and is the largest fluke in the world. It is a trematode and lacks an anus. It has a single mouth that leads to a blind gut.
So, the correct answer is 'Fasciola'.

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