Question

Interrelationships of hemichordata urochordata and cephalochordata

Answer 1

In cephalochordates, notochord and nerve cord extend the entire length of body and is present throughout life. Hemichordates, on the other hand, lack notochord and true dorsal nerve cord.

Hemichordates and urochordates are non-metameric whereas cephalochordates are metameric.

Hemichordates are worm like animals where urochordates are bag like in shape. Cephalochordates are fish-like in shape.

Urochordatrs are hermaphrodits whereas sexes are separate in cephalochordates.

In urochordates,the adult body is covered by a tunic or test.The adult body of hemichordates and cephalochordates is not covered by an exoskeleton.

Answer 2

Features of Phylum

Explanation:

Characteristics  Features of Phylum Hemichordata  

• Hemichordata is respectively balanced and triploblastic creature.  
• They are only marine creatures.  
• They can be single or in provinces.  
• Hemichordata have a genuine body pit or coelom.  

Characteristics  Features of Cephalochordata  

• Cephalochordata are little, divided marine creatures that have lengthened bodies with a notochord that broadens the length of the body, stretching out from head to tail, persevering all through the creature's life.  
• Cephalochordates are spoken to in present day seas by the Amphioxiformes (lancelets, otherwise called amphioxus).