EVERYDAY SCIENCE

Detailed explanation-1: -Approximately 97% of animals on our planet are invertebrates, or animals with no backbone. When we think of “animals, ” we often think of vertebrates (animals with backbones) like lions, tigers, bears and, of course, humans.

Detailed explanation-2: -Vertebrates make up less than five percent of all described animal species; the rest are invertebrates, which lack vertebral columns. The vertebrates traditionally include the hagfish, which do not have proper vertebrae due to their loss in evolution, though their closest living relatives, the lampreys, do.

Detailed explanation-3: -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-4: -Invertebrates are animals without a backbone or bony skeleton. They range in size from microscopic mites and almost invisible flies to giant squid with soccer-ball-size eyes. This is by far the largest group in the animal kingdom: 97 percent of all animals are invertebrates.

Detailed explanation-5: -Some animals, like dogs, cats, birds, lizards, fish, and even humans have backbones-Scientists classify backboned animals as vertebrate. Other animals, such as squid, worms, bugs, and clams do not have backbones. Scientists call these animals invertebrates.