What is an invertebrate?

• Alive
• Lack vertebral column
• Normally lacks cellulose
• Eukaryotic (have a true nucleus)
• Acellular or multicellular
• Normally dependent upon others for the production of their own food

The Five kingdom concept

• 
  Monera(split into Archeobacteria and Eubacteria)
• 
  Protista
• 
  Fungi
• 
  Metazoa
• 
  Metaphyta

Chordate Characteristics

• dorso hollow nerve cord
• notochord
• paired pharyngeal gill slits
• post anal tail
• ventral heart

The Origin of life

Atributes of living things

• use energy
• replication
• have structure
• respond to external stimuli