Animals that are invertebrates don't have spines. They include organisms like Arthropods and coelenterates. They are completely different from animals that are classed as vertebrates, which includes mammals, birds, fish, reptiles and amphibians.
The way animals are classified as vertebrate or invertebrate, is on, simply, if they have a spine or not! Animals who don't have spines, are invertebrate, and ones that do are vertebrate.
Because those are the two major groups, the rest just branch off. Besides I think its a very effictive way of organazation
Ok, first of all it is Invertebrate. vertebrates are animals with backbones. and a invertebrate is the opposite. Or an animal without a back bone.
The early bird gets the worm!
They are both vertebrate, and invertebrate. I know, it is confusing. I was confused at first.
Invertebrates would be considered animals because of the scientific classification system.The first step in the system is determining if it is a plant, animal, fungus and so on. If it is determined to be an animal, then the next step would be figuring out if it is a vertebrate or an invertebrate.
Humans don't have "invertebrae". First off, an invertebrate is an animal that doesn't have a vertebrae, or spinal cord.
Carolus Linnaeus
animal classifiers classify animals... its their job
Jawless fish - the earliest known vertebrate was the Myllokunmingia.
Animal Species
First . . . one spinal bone is a vertebra (VERT uh brah). Multiple spinal bones are vertebrae (VERT uh bray). An animal with a spine is said to be a vertebrate animal. Vertebrae are separated by spinal discs which act as shock absorbers.
Best guess is a proto-bacteria about 3 to 4 billion years ago. First vertebrate was a marine worm about 1 billion years ago.
leeches were first used for bleeding centuries ago but are still used for the disposal of dead tissue as are maggots. they are bred in sanitised areas and for medical purposes only. they are not taken from lakes or bins. alison marsh