Statement X: All chordates are not vertebrate | vedclass

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(A) Statement $X$ is true because the phylum $Chordata$ includes three subphyla: $Urochordata$,$Cephalochordata$,and $Vertebrata$. $Urochordata$ and $

Vedclass · Accepted Answer

Statement $X$ is true and Reason $Y$ is the correct explanation for Statement $X$.

Vedclass · Answer

(A) Statement $X$ is true because the phylum $Chordata$ includes three subphyla: $Urochordata$,$Cephalochordata$,and $Vertebrata$. $Urochordata$ and $Cephalochordata$ are collectively known as protochordates and are not vertebrates.Reason $Y$ is also true because $Balanoglossus$ belongs to the phylum $Hemichordata$,which was previously considered a subphylum of $Chordata$ but is now classified as a separate phylum. Even if considered within the context of chordate-like organisms,it lacks a vertebral column.Since $Balanoglossus$ is not a vertebrate,it serves as an example supporting the fact that not all chordate-like organisms are vertebrates. Therefore,Reason $Y$ correctly explains why Statement $X$ is true.

Column $X$ (Phylum)	Column $Y$ (Example)
$(1)$ Protozoa	$(P)$ Bath sponge
$(2)$ Coelenterata	$(Q)$ Liver fluke
$(3)$ Porifera	$(R)$ Jellyfish
$(4)$ Platyhelminthes	$(S)$ Opalina

Statement $X$: All chordates are not vertebrates.
Reason $Y$: $Balanoglossus$ is not a vertebrate.

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Select the correct match for $X$ and $Y$:
Column $X$ (Phylum) Column $Y$ (Example)
$(1)$ Protozoa $(P)$ Bath sponge
$(2)$ Coelenterata $(Q)$ Liver fluke
$(3)$ Porifera $(R)$ Jellyfish
$(4)$ Platyhelminthes $(S)$ Opalina

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Statement $X$: All chordates are not vertebrates.Reason $Y$: $Balanoglossus$ is not a vertebrate.