NEET BIOLOGY

Detailed explanation-1: -invertebrate, any animal that lacks a vertebral column, or backbone, in contrast to the cartilaginous or bony vertebrates. More than 90 percent of all living animal species are invertebrates.

Detailed explanation-2: -Animals without backbones are called invertebrates. They range from well known animals such as jellyfish, corals, slugs, snails, mussels, octopuses, crabs, shrimps, spiders, butterflies and beetles to much less well known animals such as flatworms, tapeworms, siphunculids, sea-mats and ticks.

Detailed explanation-3: -Final Answer: Animals without a backbone are called invertebrates.

Detailed explanation-4: -Invertebrates that you may be familiar with include spiders, worms, snails, lobsters, crabs and insects like butterflies.

Detailed explanation-5: -The 5 groups of vertebrates (animals that have a backbone) are fish, amphibians, reptiles, birds, and mammals. Invertebrates are animals that do not have a backbone. A spider is an invertebrate because it is an animal without a backbone.