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  • Which of the following are correctly matched?Option: 1 Unsegmented body- AschelminthesOption: 2</strong

Which of the following are correctly matched?

Option: 1

Unsegmented body- Aschelminthes


Option: 2

Pseudo Segmented body- Arthropoda


Option: 3

Segmented body- Platyhelminthes


Option: 4

Unsegmented body- Annelida


Answers (1)

best_answer

 

 

Segmentation and Notochord -

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.

Unsegmented animals do not show any segmentation, e.g., aschelminthes.

Posted by

himanshu.meshram

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