Describe the mechanism of evolution as explained by Hugo de Vries.

Explanation

Hugo de Vries worked on evening primorse and put forward the idea of mutations, i.e. large difference arising suddenly in population. He believed mutations cause evolution and not the minor heritable continuous variations as proposed by Darwin. Evolution for Darwin was gradual, while de Vries believed that mutation caused species formation and hence, known as "saltation (single step large mutation). Thus, evolution is a jerky process.