Ventral muscular heart,kidneys for excretion | vedclass

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Question

(C) The features mentioned (ventral muscular heart,kidneys for excretion/osmoregulation,and paired appendages) are characteristic of most Gnathostomes

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Petromyzon

Vedclass · Answer

(C) The features mentioned (ventral muscular heart,kidneys for excretion/osmoregulation,and paired appendages) are characteristic of most Gnathostomes (jawed vertebrates).$1$. $Labeo$ (a bony fish) possesses these features.$2$. $Balaenoptera$ (a whale,mammal) possesses these features.$3$. $Rana$ (a frog,amphibian) possesses these features.$4$. $Petromyzon$ (a lamprey) belongs to the class Cyclostomata. Cyclostomes are jawless vertebrates $(Agnatha)$ and lack paired appendages (fins or limbs). Therefore,$Petromyzon$ is the exception.

Ventral muscular heart,kidneys for excretion and osmoregulation,and paired appendages are found in all of the following $EXCEPT$:

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