Question

According to Hugo de Vries, the mechanism of evolution is ____________.

• A. Phenotypic variations
• B. Multiple step mutations
• C. Minor mutations
• D. Saltation

Answer 1

The correct option is D Saltation

• Hugo de Vries believed that mutation causes species formation and this is known as saltation. Saltation is the single step large mutation which results in the formation of new and advanced species. He believed that the minor heritable variations which were mentioned by Darwin was not responsible for evolution.

Thus, the correct answer is option D.