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Biology · 2023 · 3 marks
CBSE 2023 · Region 3 · Set 1 · Q25
(a) Darwin's theory of Natural Selection is widely accepted but some limitations have been identified by modern biologists. Mention the limitations…
(a)
Darwin's theory of Natural Selection is widely accepted but some limitations have been identified by modern biologists. Mention the limitations identified.
(b)
Name and state the most accepted theory of evolution in modern times.
(c)
Mention any two ways the limitations identified in Darwin's theory of evolution are explained in modern biology.
Marking-scheme solution
(a)
Darwin's theory could not explain how the variations arose.
(b)
Synthetic theory of evolution
Origin of species is based on the interaction of genetic variation and natural selection.
(c)
Mutation, recombinants formed during meiosis / crossing over /hybridization /sexual reproduction
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.