Question

Body cylindrical, divided into ring like segments, with coelom and digestive system are characteristics of phylum

• A. Coelenterata
• B. Arthropoda
• C. Annelida
• D. Mollusca

Answer 1

Answer: (C)

Annelida

Annelids have a cylindrical body divided into a ring-like segment called as an annulus with true coelom and developed digestive system.

Characteristics of Annelids:

• Bilaterally symmetrical and vermiform.
  
• The body has more than two cell layers, tissues, and organs.
  
• The body cavity is a true coelom, often divided by internal septa.
  
• The body possesses a through the gut with mouth and anus.
  
• The body possesses 3 separate sections, a prostomium, a trunk, and a pygidium.
  
• It has a nervous system with an anterior nerve ring, ganglia, and a ventral nerve cord.
  
• It has a true closed circulatory system.
  
• It has no true respiratory organs.
  
• Reproduction is normally sexual and gonochoristic or hermaphroditic.
  
• Troch phore lava is present during indirect development.