Hugo de Vries's experimental organism was
Fruitfly
China rose plant
Four O'clock plant
Evening primrose
Which one of the following was the contribution of de Vries
Mutations are mainly responsible for controlling
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
$A$ : Mutations are non-directional.
$R$ : Darwin’s small variations are directional.