Question

A new feature notochord appeared in a phylum of animalia.
a) Name the phylum.
b) Where is the notochord located?
c) Write its function.
d) Name 2 organisms belonging to this phylum.

URGENT!!!!

Answer 1

 a)Phylum-Chordata
b)this phylum is divided into 3 they are : urochordatd , cephalochordata , vertebrata 
In urochordata , notochord present only in larval tail.
In cephalochordata , it extends from head to tail region and is persisted throughout their life
In vertebrate  notochord is possessed during the embryonic period .
eg;- Ascidia,Branchiostoma,Myxine