Section 3:  The Diversity of Living Things

Chapter 4 Section 3 Presentation
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Key Terms:

• archaebacteria
• eubacteria
• fungus
• protist
  
• gymnosperm
  
• angiosperm
  
• invertebrate
  
• ​vertebrate
  

Main Ideas:

• Organisms can be divided into six kingdoms, which are distinguished by the types of cells they possess and how they obtain their food.
• Bacteria and fungi play the important environmental roles of breaking down dead organisms and recycling nutrients.
  
• Gymnosperms, which include the conifers, are the earliest plants with seeds.  Angiosperms are flowering plants.
  
• Insects, invertebrates that are the most successful animals on Earth, affect humans in both positive and negative ways.
• Vertebrates, or animals with backbones, include fish, amphibians, reptiles, birds, and mammals.