The mutation theory of saltation given by Hugo deVries based on his work on:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Evening primrose
Option (3) Evening primrose — Correct. Of the options, only the evening primrose is the plant de Vries worked on. Garden pea was the plant of Mendel and Drosophila the fly of Morgan.
NCERT Extract:
Mechanism of Evolution – “… In the first decade of twentieth century, Hugo deVries based on his work on evening primrose brought forth the idea of mutations – large difference arising suddenly in a population. He believed that it is mutation which causes evolution and not the minor variations (heritable) that Darwin talked about. Mutations are random and directionless while Darwinian variations are small and directional. Evolution for Darwin was gradual while deVries believed mutation caused speciation and hence called it saltation (single step large mutation).”