Write two characteristic features of the phylum to which Ascaris belongs. Name the parasitic worm that causes elephantiasis.

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(N/A) The phylum to which Ascaris belongs is Nematoda (or Aschelminthes).
Two characteristic features of this phylum are:
$1$. The body is cylindrical in shape and circular in cross-section.
$2$. They are pseudocoelomate,meaning they possess a false body cavity.
The parasitic worm that causes elephantiasis (filariasis) is Wuchereria bancrofti (commonly known as the Filarial worm).

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