A: All chordates have kidneys as excretory or | vedclass

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(D) The Assertion is incorrect because not all chordates possess kidneys as excretory organs.$1$. In $Urochordata$,excretion occurs through neural gla

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Assertion is incorrect,but Reason is correct.

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(D) The Assertion is incorrect because not all chordates possess kidneys as excretory organs.$1$. In $Urochordata$,excretion occurs through neural glands.$2$. In $Cephalochordata$,excretion occurs through protonephridia.Kidneys are specialized excretory organs primarily found in $Vertebrates$ to perform both excretion and osmoregulation.Therefore,the Assertion is incorrect,while the Reason is a scientifically correct statement regarding the function of kidneys.

$A$: All chordates have kidneys as excretory organs.
$R$: Kidneys help in the removal of metabolic wastes along with regulating the osmolarity of body fluids.

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$A$: All chordates have kidneys as excretory organs.$R$: Kidneys help in the removal of metabolic wastes along with regulating the osmolarity of body fluids.