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  • Notochord isOption: 1 Mesodermally derived structure  Option: 2 Ectodermally de

Notochord is

Option: 1

Mesodermally derived structure
 


Option: 2

Ectodermally derived structure
 


Option: 3

Endodermally derived structure
 


Option: 4

can be any depending on condition


Answers (1)

best_answer

 

 

Notochord: 

  • It is the rod-like cartilaginous structure which is present dorsally during the development of embryo in animals. 
  • It is derived from the mesoderm. 
  • Those animals that do not possess notochord at any stage of their life cycles are called non-chordates. They are also called the invertebrates. For example, sponges, coelenterates, platyhelminthes etc.
  • Those animals that possess the notochord either throughout or at any stage of their life cycles are called chordates. For example, hemichordates, urochordates etc.
  • In some chordates, the notochord is replaced by a bony vertebral column. Such animals are called vertebrates. For example, mammals.

 

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Notochord is the rodlike cartilaginous structure which is present dorsally during the development of embryo in animals. It is derived from the mesoderm.

Posted by

manish painkra

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