A fish is characterised by the presence of | vedclass

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(D) Fishes are aquatic organisms belonging to the superclass $Pisces$.They are characterized by several key features:$1$. Dermal scales: Most fishes p

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All the above

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(D) Fishes are aquatic organisms belonging to the superclass $Pisces$.They are characterized by several key features:$1$. Dermal scales: Most fishes possess an exoskeleton made of scales (placoid, cycloid, ctenoid, or ganoid) derived from the dermis.$2$. Paired fins: Fishes use paired fins (pectoral and pelvic) for locomotion, balance, and steering in water.$3$. Pharyngeal gills: Respiration occurs through gills, which are supported by pharyngeal arches.Since all these features are characteristic of fishes, the correct option is $D$.

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

$A$ fish is characterised by the presence of

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