Question

.............. are those animals which have no backbone.

• A. Invertebrates
• B. Vertebrates
• C. Mammals
• D. Aves

Answer 1

The correct option is A Invertebrates

The vertebral column is a supportive structure derived from the notochord. It is more commonly called the backbone or the spine. Animals that do not possess or develop a vertebral column or backbone are commonly called invertebrates. They include crabs, snails, lobsters, octopuses, sea urchins, worms, etc.

So, the correct answer is 'Invertebrates'.