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BIOGEOGRAPHY: NATURAL SELECTION simplified- Complete Exam Pack, Diagrams (A-Level/IB Biology Revision Notes)

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2025/2026 Written for academic year
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Biology
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Provides an in-depth and complete study on Biogeography: Natural Selection for higher secondary graduation students of Science and Medical preparing for semester as well as competitive Exams. Colorful diagrams, flow-charts and pictures incorporate ecological zoning as biome, biosphere, habitat, ecosystem, species distribution with endemism and biodiversity dispersal. Easy comprehensive and quick review prior to Tests incorporates migrations, vicariance, adaptations, natural selection, evolution, speciation with ecotone and biogeographic realm. Revision of abiotic changes like climate as per latitude and altitude, island biogeography, continental drift and plate tectonics, paleobiogeography. Essential for all students for top grades and conceptual understanding with terms as niche, ecological succession, carrying capacity, co-evolution, genetic drift, gene flow, native as well as exotic species. Biogeographical theories covered are Equilibrium theory, Dispersal theory, Centre of Origin, Latitudinal diversity gradient, species-area relationship.

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Biog eogr ap
h nition:
Defi y Study of species distribution
across Earth.

E xa mples:

Mar s u pi a l s Darwin'
in A u s t r a l i a s
fi n c h e s

Island
species

Species found in isolated regions often evolve unique
characteristics. Biogeography explains how geographic
isolation contributes to evolutionary change.

, M o d e r n
Evolutiona
ry Theory
Modern synthesis combines:


Darwin's natural
selection



M e n d e l i a n
genetics



Population
genetics



Molecular
biology



Today's understanding of evolution integrates genetics with
Darwin's ideas. Mutations create variation, while natural
selection, genetic drift, and gene flow shape populations
over time.
Connected book
image
Richard J. Huggett Fundamentals of Biogeography
Publisher: 1998 ISBN: 9780415154994 Edition: Unknown

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School year
5
Uploaded on
July 29, 2026
Number of pages
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Written in
2025/2026
Type
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Unknown
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Browse related subjects

Subjects

  • biome
  • biosphere
  • habitat
  • ecosystem
  • species distribution
  • endemism
  • biodiversity
  • migration
  • adaptations
  • natural selection
  • speciation
  • ecotone
  • continental drift
  • evolution
  • flora and fauna
  • plate tectonics
  • pale

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