Evolutionary ecology - Adaptation and natural selection

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Across
  1. 4. selection may favour alternative morphs in alternative environmental conditions
  2. 6. the variability in observable traits among individuals in a population
  3. 7. an approach where comparison of species is used to test hypotheses about adaptation or other evolutionary phenomena
  4. 8. occurs when intermediate phenotypes have the highest fitness (reduces phenotypic variance)
  5. 9. occurs when the most extreme phenotypes have the highest fitness (increases phenotypic variance by eliminating intermediate forms)
Down
  1. 1. a situation in which the relative fitness of a phenotype is a function of its frequency in a population
  2. 2. changes in the mean value of a trait
  3. 3. reproductive success over a lifetime
  4. 5. the process of change by which an organism or species becomes better suited to its environment