Pharyngeal gill slits are absent in which of | vedclass

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(A) Pharyngeal gill slits are a characteristic feature of the phylum $Chordata$. $1$. $Chordates$ possess pharyngeal gill slits at some stage of their

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Invertebrates

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(A) Pharyngeal gill slits are a characteristic feature of the phylum $Chordata$. $1$. $Chordates$ possess pharyngeal gill slits at some stage of their life cycle. $2$. $Invertebrates$ (non-chordates) are defined by the absence of a notochord and pharyngeal gill slits. $3$. $Cephalochordates$ and $Urochordates$ are subphyla of $Chordata$ and thus possess these slits. Therefore,pharyngeal gill slits are absent in $Invertebrates$.

Pharyngeal gill slits are absent in which of the following animals?

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