Question

All vertebrates are chordates but all chordates are not vertebrates, why ?

• A. Notochord is replaced by vertebral column in adult of some chordates
• B. Ventral hollow nerve cord remains throughout life in some chordates
• C. All chordates possess vertebral column
• D. All chordates possess notochord throughout their life

Answer 1

Answer: (A)

Correct answer is (a) Notochord is replaced by vertebral column in adult of some chordates