Doctrine of evolution i.e. descent with modification is concerned with :
A
Biogenesis
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B
Sudden changes
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C
Gradual changes
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D
Mutational changes
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Solution
The correct option is D Gradual changes
Darwin defined evolution as 'descent with modification', the idea that species undergo gradual changes over time, give rise to new species, and share a common ancestor.
Each species has its own unique set of heritable (genetic) differences from the common ancestor, which have accumulated gradually over long time period.