what is the difference between vertebrates and invertebrates??

Animals with an internal skeleton made of bone are called vertebrates. Some examples of

are humans, marsupials -- koala, kangaroo, wombats --, reptiles -- alligators, crocodiles, lizards --, primates -- gorillas, monkeys, orangutans --, birds, seals, whales, dolphins, porpoises, most species of fishes, and rodents. All mammals are vertebrates.

An invertebrate is the basic opposite of a vertebrate. Invertebrates do not have backbones. Some examples of invertebrates are mollusks -- snail, mussel, quahog, squid, octopus, nautilus --, echinoderms -- starfish and sea urchins --, arachnids, crustaceans -- lobsters and crabs --, all insects, annelids -- worms and leeches -- protozoa and jellyfish.

The main difference between

are that vertebrates have backbones, while invertebrates do not. Other differences are that vertebrates have highly developed brains, while most invertebrates do not. Invertebrates are slow moving, and sometimes small, while most vertebrates are faster, and sometimes larger in size than invertebrates. 98% of animal species are invertebrates, meaning that 2% of animal species are vertebrates.