Statement X: All chordates are not vertebrate | vedclass

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Question

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

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

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(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 $X$	Column $Y$
$(1)$ Skin without scales	$(P)$ Catla
$(2)$ Placoid scales	$(Q)$ Hagfish
$(3)$ Cycloid scales	$(R)$ Chameleon
$(4)$ Epidermal scales	$(S)$ Ray-fish

Column $I$	Column $II$
$(A)$ Limbless reptile	$(i)$ Lamprey
$(B)$ Jawless vertebrate	$(ii)$ Salamander
$(C)$ Amphibian	$(iii)$ Snake
$(D)$ Cartilaginous fish	$(iv)$ Shark
$(E)$ Flightless bird	$(v)$ Ostrich

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

Similar Questions

Select the correct match for $X$ and $Y$:
Column $X$ Column $Y$
$(1)$ Skin without scales $(P)$ Catla
$(2)$ Placoid scales $(Q)$ Hagfish
$(3)$ Cycloid scales $(R)$ Chameleon
$(4)$ Epidermal scales $(S)$ Ray-fish

An animal that is initially male and then changes to female is called:

Comb jellies are ..................... and jelly fishes are .................. respectively.

Column $I$ Column $II$
$(A)$ Limbless reptile $(i)$ Lamprey
$(B)$ Jawless vertebrate $(ii)$ Salamander
$(C)$ Amphibian $(iii)$ Snake
$(D)$ Cartilaginous fish $(iv)$ Shark
$(E)$ Flightless bird $(v)$ Ostrich
Match items in column $I$ with those given in column $II$.

Features common to the animals belonging to class-$Amphibia$ and class-$Reptilia$ are

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