Select the correct statement regarding mutation theory of evolution.

(A)Large differences due to mutations arise gradually in a population
(B)This theory was proposed by Alfred Wallace
(C)Variations are small directional changes
(D)Single step large mutation is a cause of speciation

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

The answer appears as a continuous sentence in NCERT. This is that sentence.

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 matches option D's claim that 'Single step large mutation is a cause of speciation'.

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