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The Animal Kingdom
There are many different types of animals in the world. Many animals are quite similar to each other. Others are quite different. Animals can be classified based on their similarities.
Animals are classified as:
• Invertebrates
• Animals without a Backboneor Spinal Column:
• Vertebrates
• Animals with a Backbone or Spinal Column:
Invertebrates:
• Protozoa
• Echinodermssuch as starfish
• Annelidssuch as earthworms
• Molluskssuch as octopus
Invertebrates:
Arthropodssuch as crabs, spiders and insects
• Crustaceans (a very large group of Arthropods)such as crabs
• Arachnidssuch as spiders
• Insects
•
Vertebrates:
• Fish
• Amphibianssuch as frogs
• Reptilessuch as crocodiles
• Birds
Vertebrates:
• Mammals
• Marsupialssuch as kangaroos
• Primatessuch as gorillas and chimpanzees
• Rodentssuch as mice
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