Question

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

• A. (iii)-jawless, (iv)-Osteichthyes, (v)-Chondrichthyes
• B. (i)-notochord, (ii)-pharyngeal gill slits, (iv)-Chondrichthyes, (v)-Osteichthyes
• C. (iii)-jawed, (vi)-Reptiles, (vii)-uropygial
• D. (i)-four-chambered heart, (ii)-pharyngeal gill slits, (vi)-Birds, (vii)-uropygial

Answer 1

Answer: (B)

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