Levels of Biodiversity · NCERT Biology

Species richness is defined as:

  1. The relative abundance and evenness of each species
  2. The total number of species present per unit area
  3. The genetic variation found within a single species
  4. The overall variety of ecosystems present in a region
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Correct answer: The total number of species present per unit area

Species richness is a simple count of the number of different species present in a defined geographical area or community.

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