Question

Go through the following flow chart for division of subphylum vertebrata. Fill the gaps $A, B, C$ and $D$ and select the correct option.

• A. a
• B. b
• C. c
• D. d

Answer 1

Answer: (A)

a

Answer 2

Subphylum Vertebrata is divided into two divisions. They are agnatha (jawless) and gnathostomata (with jaw). Agnatha are further divided into two dasses-Ostracodermi, which is extinct and Cyclostomata (e.g., hag fish). Jawed vertebrates are divided into two superdasses-Pisces (true fish) and Tetrapoda (four limbs).