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  • Septation and annuli are the features shown byOption: 1 EarthwormOption: 2 Tapeworm</di

Septation and annuli are the features shown by

Option: 1

Earthworm


Option: 2

Tapeworm


Option: 3

Pinworm


Option: 4

Hookworm


Answers (1)

best_answer

 

 

Segmentation: 

  • It refers to the division of the body into numerous transverse segments called metameres. These metameres function in coordination with each other. 
  • The segmentation is also called as metamerism. 

Based on metamerism, animals can be of following types:

Unsegmented: 

  • These animals do not show any segmentation, e.g., aschelminthes.

Segmented: 

  • The body is divided into segments not only externally but also internally. 
  • There occurs septation along the inner body walls that divide the organs internally. 
  • It is called true segmentation, as seen in annelids.

Pseudosegmentation: 

  • The body is divided into segments only externally. 
  • Each such segment is capable of growing individually, as seen in tapeworms.

 

 

The body is divided into segments not only externally but also internally. There occurs septation along the inner body walls that divide the organs internally. It is
called true segmentation, as seen in annelids.

Posted by

shivangi.shekhar

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