Question

Select the correct difference between the notochord in the following.

Urochordata		Cephalochordata
a	Present only in larval tail	-	Extend from head to tail throught life
b	Present only in adult	-	Present only in larval tail
c	Persistent throughout their life	-	Present only in adult
d	Extend from head to tail throughout life	-	Present only in larval tail

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (A)

Option (a) contains the correct pair of difference between notochord in Urochordata and Cephalochordata. In Urochordata, notochord is present only in larval tail, while in Cephalochordata, it extends from head to tail region and is persistent throughout their life.