Biodiversity and how it is measured, classification and the species concept, adaptation, natural selection, and conservation.
Biodiversity is the variety of life — measured at the level of habitats, species and genes.
Measuring biodiversity
Species richness = the number of different species in an area.
Species evenness = how evenly individuals are spread among those species.
An index of diversity combines both: a community with many species and even numbers has higher diversity than one dominated by a single species.
Genetic diversity = the variety of alleles in a population; high genetic diversity helps a population adapt to change.
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