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Unit: Evolution of Populations

Aligned to Science TEKS with clear Learning Outcomes, this unit covers instructional content including Sources of Genetic Variation, Natural Selection in Populations, Evolutionary Mechanisms, Speciation, and Patterns of Evolution.


  • 7C  Analyze and evaluate how natural selection produces change in populations, not individuals
  • 7D  Analyze and evaluate how the elements of natural selection, including inherited variation, the potential of a population to produce more offspring than can survive, and a finite supply of environmental resources result in differential reproductive success
  • 7E  Analyze and evaluate the relationship of natural selection to adaptation and to the development of diversity in and among species
  • 7F  Analyze and evaluate the effects of other evolutionary mechanisms, including genetic drift, gene flow, mutation, and recombination
  • 12B  Compare variations and adaptations of organisms in different ecosystems