what is the main character of proto chordata
plss give anss its urgent
Answers
Answer:
The true brain or skull is absent.
The true heart and kidneys are absent.
They lack jaws altogether.
Vertebrate and paired appendages are absent.
Peculiar type of embryonic development is found.
They are all marine and small sized animals.
Head and exoskeleton are not found.
Coelom is enterocoelic.
Pharyngeal gill-clefts are permanent.
Endostyle is present.
Explanation:
phylum chordata is divided into three sub phylum vertebrata, urochordata and cephalochordata..
the subphylum urochordata and cephalochordata are together called as protochordates....
in euro chordates the notochord is present only in larval stage and only in the tail region it is not present in the adult organism... whereas in cephalochordata the notochord extends from head to tail and it is persistent throughout their life...
they have a tail..
heart is present on dorsal side...
single hollow nerve cord is present