A schematic representation of a chordate's em | vedclass

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(D) The figure represents the fundamental characteristics of the phylum Chordata. $A$ points to the post-anal tail,which is a posterior extension of t

Vedclass · Accepted Answer

Post anal tail,Notochord,Nerve cord and Gill slits

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(D) The figure represents the fundamental characteristics of the phylum Chordata. $A$ points to the post-anal tail,which is a posterior extension of the body beyond the anal opening. $B$ points to the notochord,a flexible rod-like structure. $C$ points to the dorsal hollow nerve cord. $D$ points to the pharyngeal gill slits. Therefore,the correct sequence is $A$: Post anal tail,$B$: Notochord,$C$: Nerve cord,$D$: Gill slits. Comparing this with the given options,option $C$ is incorrect in its sequence,and option $D$ matches the labels correctly.

$A$ schematic representation of a chordate's embryo is shown in the figure. The structures marked $A, B, C$ and $D$ are respectively:

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