Classification of Living Organisms
All living organisms are classified according to how many cells they are made of, how they breed and what they eat.
There are five main groups:
Fungi – mushrooms and moulds
Bacteria – single celled organisms like: Escherichia coli and Lactobacillus acidophilus
Protista – single celled organisms like algae, amoeba
Animals - Vertebrates and Invertebrates
Animals are split into two main groups:
Vertebrates are animals with back bones
e.g. Humans, monkey, horse, dog, cat, snake, frog, crocodile, sheep, newt, dolphins, whale, elephant, cow
These are subdivided into five classes: Mammals, Birds, Fish, Reptiles, Amphibians.
Invertebrates are animals without back bones. These are subdivided into nine classes: Annelids, Molluscs, Insects, Roundworms, Arachnids, Echinoderms and Cnidarians.