Vertebrates & Invertebrates
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If you are an animal in the possession of a back bone or spinal column you are a vertebrate. The compromise many species of animals and fishes, reptiles and birds. If you do not have a backbone you are called an invertebrate.There are over 50,000 species of vertebrate, that sounds like a lot but there are far more invertebrates. Vertebrates are usually much larger than in vertebrates. Vertebrates are smart, some of them are very smart, like humans. Most vertebrates have an advanced nervous system, muscles and skeleton.
Evolution is a theory that explains why animals and plants are so good at surviving in their environments.means that species change over time. The theory of evolution was developed by Charles Darwin in 1859. Darwin believes that evolution work through natural selection.for example rabbits live all over the earth but Rapids is in the forest are good for and rabbits live in the snow Wait for rabbits are far more likely to survive if the coloring matches their environment Charles Darwin would call this survival of the fittest because animals which are best able to survive also fit better into the ecosystem are far more likely to live.