what is urochordata?Write the general characteristics of urochordata?what is the difference between larval and adult urochordates?
Answers
Answer:
An urochordate is a marine invertebrate animal, a member of the subphylum Tunicata. It is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords. The subphylum was at one time called Urochordata, and the term urochordates is still sometimes used for these animals.
GENERAL CHARACTERS
There is a dorsal nerve cord.
There is the presence of notochord.
There is the absence of a tail.
The body is unsegmented.
The feeding is done by the movement of cilia.
There is no coelom observed in the body.
Open type of circulation is seen.
The excretion occurs
The larvae has notochord but the adults different from larvae in that the adult form has no notochord, nerve cord, or tail. In fact, an adult tunicate is an immobile, filter-feeding marine animal that in some ways looks more like a sponge or a mollusk than a chordate.
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