EvolutionHigh NEET PriorityClass 12
Natural Selection
Definition
Natural selection is the process by which organisms with favorable traits are more likely to survive and reproduce, passing these traits to the next generation. First proposed by Charles Darwin, it is the primary mechanism of evolution. Over time, beneficial traits become more common in a population while harmful traits decrease.
Key Points for NEET
- 1Requires variation, heritability, and differential reproduction
- 2Acts on phenotypes, not genotypes
- 3Can be stabilizing, directional, or disruptive
- 4Leads to adaptation and evolution
- 5Different from artificial selection (human-directed)
Example
Peppered moths: dark moths survived better in polluted areas, changing population color
Asked in NEET
NEET 2023NEET 2022NEET 2020
Related Terms
EvolutionAdaptationFitnessDarwinSpeciation
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