The middle gastrula stage is characterized by | vedclass

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(C) During the process of gastrulation,the middle gastrula stage is marked by the presence of both the $blastopore$ and the $archenteron$. The $archen

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Blastopore and archenteron are present

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(C) During the process of gastrulation,the middle gastrula stage is marked by the presence of both the $blastopore$ and the $archenteron$. The $archenteron$ is the primitive gut cavity formed during gastrulation,and the $blastopore$ is the opening that connects the $archenteron$ to the exterior. While the yolk plug is a feature of the late gastrula stage,the presence of the $archenteron$ and $blastopore$ is the defining characteristic of the middle gastrula.

The middle gastrula stage is characterized by:

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