5.2 Natural Selection

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DP IB Biology (05 Evolution and Biodiversity) Mapa Mental sobre 5.2 Natural Selection, criado por Steve Harton em 25-05-2014.
Steve Harton
Mapa Mental por Steve Harton, atualizado more than 1 year ago
Steve Harton
Criado por Steve Harton mais de 10 anos atrás
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Resumo de Recurso

5.2 Natural Selection
  1. Nature of Science
    1. The theory of evolution by natural selection
      1. TOK
        1. How much evidence is required to support a theory?
          1. What sort of counter evidence is required to refute it?
          2. Adaptations are characteristics that make an individual suited to its environment and way of life
            1. Individuals that are better adapted tend to survive and produce more offspring while the less well adapted tend to die or produce fewer offspring
              1. Species tend to produce more offspring than the environment can support
                1. Individuals that reproduce pass on characteristics to their offspring
                  1. Natural selection increases the frequency of characteristics that make individuals better adapted and decreases the frequency of other characteristics leading to changes within the species
            2. Characteristics acquired during the lifetime of an individual are not heritable
              1. Examples
                1. Antibiotic resistance
                  1. Beaks in the finches on Daphne Major
              2. Variation
                1. Natural selection can only occur if there is variation among members of the same species
                  1. Sexual reproduction
                    1. Mutations
                      1. Meiosis

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