Q. Consider the following statements (A-D) each with one or two blanks.
A. Four characters of chordates are the presence of . dorsal hollow nervous system, and muscular tail.
B. Agnatha are the most primitive craniates. They are commonly called vertebrates.
C. Electric ray belongs to Class while sea horse belongs to class .
D. are also defined as feathered bipeds. These have a gland on the tail.
Which one of the following options, correctly fills any two of the given statements?

 1800  159 Animal Kingdom Report Error

Solution:

Correct answer is (b) (i)-notochord, (ii)-pharyngeal gill slits, (iv)-Chondrichthyes, (v)-Osteichthyes