An intermediate host is absent in the life cycle of which parasite?

Which of the following characteristics is $NOT$ correct for the phylum $Nematoda$?

While trying to find out the characteristics of a newly found animal,a researcher performed histology on the adult animal and observed a cavity with the presence of mesodermal tissue towards the body wall,but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelom of that animal?

The size of the female $Ascaris$ $lumbricoides$ is:

In $Aschelminthes$,the excretory tube removes body wastes from the body cavity through:

$A$ rhabditiform larva is formed in the life cycle of