TNPSC syllabus topic · Bilingual study guide

Evolution

Evolution begins with heritable population change and connects early Earth chemistry, experimental evidence and the emergence of first cells.

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11 bilingual articles

2 min

Evolution: Origin of Life, Chemical Evolution and First Cells

Evolution begins with heritable population change and connects early Earth chemistry, experimental evidence and the emergence of first cells.

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1 min

Evolution: Geological Time, Fossil Dating and Fossilization

Geological divisions organise Earth's history, while fossil dating and preservation reveal when organisms lived and how lineages changed.

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2 min

Evolution: Anatomical, Embryological and Molecular Evidence

Homology, analogy, vestiges, embryo development and conserved molecules provide complementary evidence for evolutionary relationships.

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2 min

Evolution: Lamarck, Darwin and Natural Selection

Lamarck linked use and disuse with acquired characters, while Darwin explained differential survival through variation and natural selection.

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1 min

Evolution: Mutation, Modern Synthesis and Industrial Melanism

Mutation and recombination generate heritable variation, while modern synthesis explains how selection changes its frequency in populations.

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1 min

Evolution: Adaptive Radiation and Darwin's Finches

Adaptive radiation produces related species suited to different habitats, illustrated by Darwin's finches and Australian marsupials.

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2 min

Evolution: Microevolution, Gene Flow and Genetic Drift

Microevolution is change within populations as selection, migration, drift, mutation and recombination alter allele frequencies over generations.

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1 min

Evolution: Hardy-Weinberg Equilibrium and Allele Frequencies

Hardy-Weinberg equilibrium supplies a quantitative baseline: without evolutionary forces, allele and genotype frequencies remain constant.

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1 min

Evolution: Human Lineage and Major Evolutionary Changes

The textbook traces a broad human lineage through primate relatives and hominins, linking anatomy, tool use, culture and dispersal.

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1 min

Evolution: Reproductive Isolation and Speciation

Prezygotic and postzygotic barriers restrict gene flow; persistent isolation and divergence can produce new species in the same or separate areas.

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2 min

Evolution: Species, Mass and Global Extinction

Extinction can remove one species, many lineages in an ecosystem or major groups worldwide, reshaping habitats and later evolution.

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