Question

Vertebrates constitute approximately ..........% of the total animals.

• A. 5%
• B. 10%
• C. 15%
• D. 20%

Answer 1

The correct option is A 5%

Vertebrates are advanced chordates and also known as Euchordates. They have notochord at embryonic stages which gets replaced by a vertebral column or backbone in the adults. Vertebrates constitute about 5% of the total animals.

So, the correct answer is '5%'.