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  • Which of the following is not a characteristic of phylum Annelida?Option: 1 PseudocoelomOption: 2</stro

Which of the following is not a characteristic of phylum Annelida?

Option: 1

Pseudocoelom


Option: 2

Ventral nerve cord


Option: 3

Closed circulatory system


Option: 4

Segmentation


Answers (1)

 

 

Phylum Annelida 

  • The term ‘Annelida’ is derived from the Latin term annellus, that implies small rings. This phylum contains the animals that are also called ‘Ringworms’.
  • The body of annelids is truly segmented because these segments or metameres are externally visible as annuli and internally as septation. 
  • Segmentation improves the movement and enhances the chances of survival by providing redundancy.
  • They are triploblastic and bilaterally symmetrical. 
  • They have a true coelom, i.e., they are coelomate. The mesoderm lines the cavity on both sides. 

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They have a true coelom, i.e., they are coelomate. The mesoderm lines the cavity on both sides.

Posted by

Sumit Saini

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