125. Theory of Natural Selection dwells on

(A)role of environment in evolution
(B)natural selection acting on favourable variations
(C)changes in gene complex resulting in heritable variations
(D)none of the above

The NCERT line that answers it

Verbatim line

The novelty and brilliant insight of Darwin was this: he asserted that variations, which are heritable and which make resource utilisation better for few (adapted to habitat better) will enable only those to reproduce and leave more progeny.

Chapter: Evolution
Section: 6.5 BIOLOGICAL EVOLUTION
Page: 9
Words matched: 38 of 38

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

How this line gives the answer

0, emb=0.8841, combined=0.9305). Verified: high — The span explicitly states that variations making resource utilization better (favorable variations) enable those organisms to reproduce and leave more progeny, which directly matches option B's description of natural selection acting on favorable variations.

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