Question

unique characteristics feature of:
1) Annelida
2) athropoda
3) platihelmenthes

Answer 1

the answer ;

option ( a )

annelida.

unique characteristics feature of annelida.

Answer 2

Annelida = all  the annelids have a fluid-filled cavity between the outer body wall and the gut, and this is referred to as a coelom .The coelom is often used as a storage area for gametes and acts as a hydrostatic skeleton for locomotion.

Arthropoda =  It is a phylum of triploblastic, haemocoelomic, segmented invertebrates having head, thorax and abdomen, a chitinous exoskeleton and jointed legs and appendages.


Platyhelminthes. = Also, they are triploblastic, with three germ layers. They do not have a body cavity and are acoelomate. They exhibit an organ system grade of organization.
Platyhelminthes. Also, they are triploblastic, with three germ layers. They do not have a body cavity and are acoelomate. They exhibit an organ system grade of organization.