What is the level of body organization in Aschelminthes?

Step-by-step solution

The body of Aschelminthes is circular in cross-section, hence the name roundworms. Aschelminthes may be freeliving, aquatic and terrestrial or parasitic in plants and animals.Alimentary canal is complete with a well- developed muscular pharynx. An excretory tube removes body wastes from the body cavity through the excretory pore. Sexes are separate (dioecious), i.e., males and females are distinct. Often females are longer than males. Fertilisation is internal and development may be direct (the young ones resemble