According to Hugo de Vries, the mechanism of evolution is

(A)Multiple step mutation
(B)Saltation
(C)Minor mutations
(D)Phenotypic variations

The NCERT line that answers it

Verbatim line

Evolution for Darwin was gradual while deVries believed mutation caused speciation and hence called it **saltation** (single step large mutation).

Chapter: Evolution
Section: 6.6 MECHANISM OF EVOLUTION
Page: 9
Words matched: 20 of 20

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How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'deVries believed mutation caused speciation and hence called it saltation (single step large mutation)', which directly identifies saltation as de Vries' mechanism of evolution and distinguishes it from Darwin's gradual evolution.

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