CBSE 2024 · Region 2 · Set 3 · Q27 · 3 marks
(a)List the salient features of Darwin's theory of natural selection.(b)Microbes have proved to be suitable examples to study evolution by natural selection. Justify giving reasons.
(a)
List the salient features of Darwin's theory of natural selection.
(b)
Microbes have proved to be suitable examples to study evolution by natural selection. Justify giving reasons.
Marking-scheme solution
(a)
Population size grows exponentially, compete for resources only some survive and grow and others or weaker perish, organisms with favourable variations survive and reproduce called survival of the fittest, favourable variations get accumulated over a period of time and get naturally selected so that new forms arise.
(b)
Microbes divide fast with shorter life span and, variations can be observed
in larger population within short time.
EvolutionMechanism of EvolutionUnderstandshort_answermedium
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CBSE Class 12 Biology past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.