Classification WritingScientists classify animals into different categories. The categories different names are vertibrates and invertibrates.
Vertibrates have a backbone. Mammals,birds,reptiles,amphibians and fish are like humans because they are warm blooded like us.
Invertibrates have no backbone unlike verterbrates witch do have a backbone. 97% of the animal kingdom is invertibrates. There are 7 main groups of invertibrates. Athropods have segmented bodies as well as exoskelelton, jointed legs.
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