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Name the phylum which has a single opening for taking food and throwing out faeces?

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Name the phylum which has a single opening for taking food and throwing out faeces?

(a) Coelenterate

(b) Porifera

(c) Annelida

(d) Aschelminthes

The question was asked in class test.

Question is taken from Animal’s Classification topic in division Diversity of Life of Life Sciences

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Correct option is (a) Coelenterate

The explanation is: Organisms of this phylum have a single opening known as hypostome, used for both taking food and throwing out of faeces.

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