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Coincidence/Mayr: we call a certain mutation coincidental if it is not related to present needs of the organism and is otherwise unpredictable.
Coincidence/Mayr: dominates the variation
Necessity/Mayr: dominates in selection.
Selection: there is no "selective force"!
Selection: Bates' discovery of mimicry (1862) in edible and poisonous butterflies: first proof of natural selection.
Benefit/Biology: what is the benefit of the emergence of a trait for survival: adaptionist program.
Das ist Biologie Heidelberg 1998