[Campbell Biology P.536] The text identifies three main mechanisms that can cause changes in... | Practice Question

The text identifies three main mechanisms that can cause changes in allele frequencies microevolution . Which of these mechanisms is consistently described as improving the degree to which organisms are well suited for life in their environment adaptation ?

  • A: Genetic drift
  • B: Gene flow
  • C: Natural selection
  • D: Genetic mutation

Explanation

The text states: 'Each of these mechanisms affects the genetic composition of populations, but only natural selection consistently improves the degree to which organisms are well suited for life in their environment adaptation .'