Radial symmetry is not found in

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(D) Radial symmetry is a type of body symmetry where an organism can be divided into identical halves by any plane passing through the central axis.$H

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Spider

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(D) Radial symmetry is a type of body symmetry where an organism can be divided into identical halves by any plane passing through the central axis.$Hydra$ (Cnidaria) exhibits radial symmetry.Adult $Starfish$ (Echinodermata) exhibits radial symmetry (specifically pentamerous radial symmetry).$Sponges$ (Porifera) are mostly asymmetrical,though some are radially symmetrical. However,the most distinct lack of radial symmetry is found in $Spider$ (Arthropoda).$Spiders$ belong to the phylum Arthropoda,which exhibits bilateral symmetry,not radial symmetry.Therefore,the correct answer is $Spider$.

List-$1$ (Branch of Science)	List-$2$ (Field of Study)
$a$. Mycology	$p$. Study of birds
$b$. Ornithology	$q$. Study of worms
$c$. Herpetology	$r$. Study of fishes
$d$. Ichthyology	$s$. Study of fungi
	$t$. Study of reptiles/amphibians

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