Phylum – Aschelminthes The body of the aschelminthes is circular in cross-section, hence, the name roundworms (Figure 4.10). They may be freeliving, aquatic and terrestrial or parasitic in plants and animals. Roundworms have organ-system level of body organisation. They are bilaterally symmetrical, triploblastic and pseudocoelomate animals. Alimentary canal is complete with a welldeveloped 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 the adult) or indirect. Examples : Ascaris (Roundworm), Wuchereria (Filaria worm), Ancylostoma (Hookworm).

 

Ancylostoma is also known as
(1) Pinworm
(2) Hookworm
(3) Flatworm
(4) Filarial worm

Answer:(2) Hookworm

Phylum – Aschelminthes

The body of the aschelminthes is circular in

cross-section, hence, the name roundworms

(Figure 4.10). They may be freeliving, aquatic

and terrestrial or parasitic in plants and animals.

Roundworms have organ-system level of body

organisation. They are bilaterally symmetrical,

triploblastic and pseudocoelomate animals.

Alimentary canal is complete with a welldeveloped

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 the adult) or indirect.

Examples : Ascaris (Roundworm), Wuchereria

(Filaria worm), Ancylostoma (Hookworm).