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Conclusion: Evolution and the arthropod

• Arthropods have diversified from their humble beginnings 500 million years ago. Some lineages, such as Opabinia and the trilobites, have gone extinct...

    

  But millions of arthropod species remain...

      

      

• The basic arthropod body layout has evolved into many forms and has been adapted for different functions...

  

  However, despite their overwhelming success, the evolution of arthropods is still limited in some ways by characteristics inherited from their ancestors...