Just a fraction of all known species-fewer than 50,000 are vertebrates, such as mammals, reptiles, anphibians and fish. The rest are inverterbrates appeared in the Earth's oceans more than 650 million years ago. Today most inveterbrates still live in oceans, but they can be found in almost every habitat worldwide. Inveterbrates, unlike veterbrates have no backbone. In fact, they have no bones at all. Inveterbrate bodies are usually supported by some kind of skeleton. Spiders, Crustacean and insects are the main phylum of Inveterbrate.
3 of the water invertebrate groups are the annelids, arthropods and crustacean.
Invertebrate 1: Thomas Hinkle Invertebrate 2: You
One of the characteristics of many invertebrate groups is that there bodies are made of very many segments. Examples include the worms, spider, starfish and insects.
Well its sort of confusing, see since the invertebrate group has more groups than the vertebrate than that means invertebrate would have more organisms.
The eight groups are:* Mollusks * Echinoderms * Arthropods * Annelids * Nematodes * Porifera* Platyhelminthes * Coelenterates Or go to:What_are_the_8_groups_of_invertebrates
An invertebrate is an organism that lacks a backbone. The 6 groups of invertebrates are sponges, cnidarians, worms, mollusks, echinoderms and arthropods.
Arthropods' bodies are segmented into three parts. The head, the thorax, and the abdomen
The horseshoe crab is an example of an animal that has both vertebrate and invertebrate features. It has a hard exoskeleton like an invertebrate, but also possesses a primitive form of a segmented backbone similar to vertebrates.
invertebrate - has exoskeleton
An invertebrate.
Porifera (Sponges)Cnidaria (Coelenterates)Flatworms (Platyhelmenthes)Roundworms (Aschelmenthes - Nematode)Segmented worms (Annelids)Mollusks (Soft-Bodied/ hard shelled Animals)Echinoderms (Spiny-Skinned Animals)Arthropods
no