In which phylum, the coelom is formed by fusion of gut pouches during embryonic stage?

Platyhelminthes

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Aschelminthes

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Annelida

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Hemichordata

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Solution

The correct option is B Hemichordata
In enterocoelous animals, the coelom is formed from pouches pinched off from the digestive tract which is also known as the embryonic gut or archenteron during the embryonic stage.
This type of coelom occurs in deuterostome animals.
Hemichordata is a phylum of marine deuterostome animals.
So, the correct answer is 'Hemichordata'.

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Apply the characters of Deuterostomes and relate the characters with their nature and form a complete paragraph.

Deuterostomes:

1). Cleavage of the zygote is___i___ and intermediate.

2). During embryonic development, the other opening of the digestive system is

formed first into and the mouth is formed later, anterior to the

blastopore and blastopore into___ii___.

3). Coelom is developed as an ___iii___of archenterons.

4). Mesoderm is derived from wall of developing ___iv___.

5). Nerve cord is ___v___ in position

6). Cell fate is determined at a very ___vi___ stage

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