A shell,as a body covering,is not present in | vedclass

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(D) The correct answer is $D$. Crustaceans do not possess a shell in the sense of a molluscan shell. Instead,their body is covered by a hard exoskelet

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Crustaceans

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(D) The correct answer is $D$. Crustaceans do not possess a shell in the sense of a molluscan shell. Instead,their body is covered by a hard exoskeleton made of chitin,which is often organized into plates. In contrast,$Cephalopoda$ (e.g.,Nautilus),$Protozoa$ (e.g.,Arcella),and $Bivalvia$ (e.g.,clams) typically possess some form of shell or protective test.

Column-$I$ (Organisms)	Column-$II$ (Common name)
$A$. Pennatula	$i$. Sea-fan
$B$. Gorgonia	$ii$. Sea-pen
$C$. Adamsia	$iii$. Sea-Anemone
$D$. Cucumaria	$iv$. Sea-cucumber

$A$ shell,as a body covering,is not present in which of the following?

Similar Questions

Identify the location and function of the following structures:
$(i)$ Comb plates
$(ii)$ Flame cells

Animals exhibiting radial symmetry are found in:

Match the organisms given in column-$I$ with their common name given in column-$II$ and choose the correct option.
Column-$I$ (Organisms) Column-$II$ (Common name)
$A$. Pennatula $i$. Sea-fan
$B$. Gorgonia $ii$. Sea-pen
$C$. Adamsia $iii$. Sea-Anemone
$D$. Cucumaria $iv$. Sea-cucumber

Select the incorrect match$-$

The study of lizards is known as:

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