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

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Provides an in-depth and comprehensive review on Evolution & Natural Selection for higher secondary graduation students preparing for semester and competitive exams in Science as well as Medicine. Key words, colorful diagrams and flow charts review evolution, natural selection, variations, adaptations, survival of the fittest and inheritance. Real pictures and figures revise terms like gene pool, genetic variations, struggle for existence, descent with modification with speciation and fossil records. Easy, quick study prior to exams for top grades incorporates Darwin's Theory, Artificial Selection, Homologous, Analogous organs, gene flow and genetic drift. Evolutionary patterns covered are divergent, convergent and parallel evolutions, coevolution, adaptive, micro- as well as macroevolution.

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EVOLUTION AND
NATURAL SELECTION

, What is evolution?

• Evolution is the change in the heritable characteristics of
biological populations over successive generations.
• It occurs when evolutionary processes such as genetic
drift, natural selection, mutation etc, act on genetic
variation, resulting in certain characteristic becoming
more or less common within a population over successive
generations.
• The process of evolution has given rise to biodiversity at
every level of biological organisation.

, REASONS FOR EVOLUTION
• GENETIC VARIATION is the difference in DNA
sequence within a population or among individuals of the
same species due to mutation and genetic recombination
during sexual reproduction.
• NATURAL SELECTION- individuals with favourable
traits survive and reproduce more successfully hence
giving rise to a more adapted generation with
advantageous traits.
• GENETIC DRIFT is the change in the frequency of an
existing allele in a population due to chance.
Connected book
image
Michaelis Michael Evolution by Natural Selection
Publisher: 2015 ISBN: 9781498700887 Edition: Unknown

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Browse related subjects

Subjects

  • variations
  • adaptation
  • survival of the fittest
  • species
  • inheritance
  • struggle for existence
  • darwins theory
  • artificial selection
  • alfred russel wallace
  • fossil records
  • isolation
  • homologous and analogous org

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