A box-like calcareous test occurs in: | vedclass

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(C) The $Echinodermata$ phylum is characterized by an endoskeleton of calcareous ossicles. In the class $Echinoidea$,specifically in organisms like th

Vedclass · Accepted Answer

Sand Dollar

Vedclass · Answer

(C) The $Echinodermata$ phylum is characterized by an endoskeleton of calcareous ossicles. In the class $Echinoidea$,specifically in organisms like the $Sand \ Dollar$ $(Echinarachnius)$ and Sea Urchins,the calcareous ossicles are fused together to form a rigid,box-like structure known as a 'test'. Therefore,the correct answer is $Sand \ Dollar$.

Column-$I$ (Animal)	Column-$II$ (Genus)
$P$. Starfish	$I$. Antedon
$Q$. Sea urchin	$II$. Echinus
$R$. Sea lily	$III$. Cucumaria
$S$. Sea cucumber	$IV$. Asterias
$T$. Brittle star	$V$. Ophiura

$A$ box-like calcareous test occurs in:

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Match the following columns:
Column-$I$ (Animal) Column-$II$ (Genus)
$P$. Starfish $I$. Antedon
$Q$. Sea urchin $II$. Echinus
$R$. Sea lily $III$. Cucumaria
$S$. Sea cucumber $IV$. Asterias
$T$. Brittle star $V$. Ophiura

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