Name the subphyla of the phylum Chordata.
(N/A) The phylum $Chordata$ is divided into three subphyla:
$1$. $Urochordata$ (Tunicata): The notochord is present only in the larval tail,e.g.,$Ascidia$.
$2$. $Cephalochordata$: The notochord extends from head to tail region and is persistent throughout their life,e.g.,$Amphioxus$.
$3$. $Vertebrata$: The notochord is replaced by a cartilaginous or bony vertebral column in the adult,e.g.,from $Cyclostomata$ to $Mammalia$.
$1$. $Urochordata$ (Tunicata): The notochord is present only in the larval tail,e.g.,$Ascidia$.
$2$. $Cephalochordata$: The notochord extends from head to tail region and is persistent throughout their life,e.g.,$Amphioxus$.
$3$. $Vertebrata$: The notochord is replaced by a cartilaginous or bony vertebral column in the adult,e.g.,from $Cyclostomata$ to $Mammalia$.
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