According to Hugo de Vries, the mechanism of evolution is
Option 1 : Minor mutations
Option 2 : Multiple step mutations
Option 3 : Phenotypic variations
Option 4 : Saltation
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According to Hugo de Vries, the mechanism of evolution is
Option 1 : Minor mutations
Option 2 : Multiple step mutations
Option 3 : Phenotypic variations
Option 4 : Saltation