Section 1:  What is Biodiversity?

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Key Terms:

• biodiversity
• gene
  
• keystone species
  
• ​ecotourism
  

Main Ideas:

• Biodiversity usually refers to the number of different species in a given area.
• The study of biodiversity starts with the unfinished task of identifying and cataloging all species on Earth.  Although scientists disagree about the probable number of species on Earth, they do agree that we need to study biodiversity more thoroughly.
• Humanity benefits from biodiversity in several ways and perhaps in some unknown ways.