Question

Write down four main characters of Annelida.

Answer 1

Main characteristics of Annelida:

(i) They are triploblastic, bilaterally symmetrical, coelomate, soft and elongated animals.
(ii) Their body is metamerically segmented externally by transverse grooves and internally by septa.
(iii) They have a tube-like alimentary canal, which is complete and extends straight from mouth to anus.
(iv) Reproduction is sexual. Sexes may be separate or united (hermaphrodite).
Examples: Sea mouse, leech, earthworm etc.