Variations caused by mutation, as proposed by Hugo de Vries, are [2019]
small and directionless
random and directional
random and directionless
small and directional
(3)
Hugo de Vries (1901) put forward the theory of evolution called mutation theory. He believed that mutation causes evolution. Mutations are discontinuous variations that are random and directionless.
According to Hugo de Vries, the mechanism of evolution is [2018]
multiple step mutations
saltation
phenotypic variations
minor mutations
(2)
As per mutation theory given by Hugo de Vries, the evolution is a discontinuous phenomenon or saltatory phenomenon (single step large mutation).
