First phylum to have a complete digestive tra | vedclass

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(C) The phylum $Aschelminthes$ (also known as $Nematoda$) is the first group of animals to exhibit a complete digestive tract,which includes a mouth a

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Ancylostoma

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(C) The phylum $Aschelminthes$ (also known as $Nematoda$) is the first group of animals to exhibit a complete digestive tract,which includes a mouth and an anus.$Ancylostoma$ (hookworm) belongs to the phylum $Aschelminthes$.$Hydra$ belongs to $Cnidaria$ (incomplete digestive tract).$Taenia$ belongs to $Platyhelminthes$ (incomplete digestive tract).$Pheretima$ belongs to $Annelida$,which also has a complete digestive tract,but it appears later in the evolutionary sequence than $Aschelminthes$.

First phylum to have a complete digestive tract can be represented by $:-$

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