Question

Write down four main characters of Nematoda. Give two examples.

Answer 1

(i) Bilaterally symmetrical, triploblastic, pseudocoelomate and unsegmented animals.
(ii) Body is worm-like, cylindrical or flattened.
(iii) Body is covered with a tough, resistant cuticle; cilia absent.
(iv) Sexes are separate
Example: Ascaris (round-worm) and Ancylostoma (hook-worm).