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Evolution

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  • Definition: Evolution
  • Key Points: Evolution
Maharashtra State Board: Class 10
CISCE: Class 10

Definition: Evolution

Evolution is a slow and continuous process whereby complex forms of life have emerged from simpler forms through millions of years.

or

The formation of new species due to gradual changes in specific characters over several generations of living organisms in response to natural selection is called evolution.

 
Maharashtra State Board: Class 10

Key Points: Evolution

  • Evolution is the gradual and progressive development of living organisms over a long period due to natural selection.
  • Life originated around 3.5 billion years ago from simple inorganic and organic compounds, eventually forming primitive cells.
  • The diversity of life on Earth today, from unicellular organisms to complex plants and animals, is a result of continuous evolutionary processes.
  • According to the theory of evolution, all complex organisms evolved slowly from unicellular ancestors over 300 crore (3 billion) years.
  • Evolution is considered an organizational and multi-dimensional process, reflecting structural and functional advancement in living organisms.

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