Natural Selection AS biology OCR Unit 2

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  • Created by: Alex
  • Created on: 26-05-11 10:57

Natural selection: is the 'selection' by the environment of particular individulas that show certain variations.these individuals will survive to reproduce and pass on their variations to the next generation

Selective forces in the environment

  • Availability of sutiable food
  • Predators
  • Diseases
  • Physical and chemical changes

New Species
Speciation: the forming of a new species from a pre-existing one

How long speciation takes
Long & slow changes resulting in the individuals nolong being able to breed and produce viable offspring
Takes many generations - bacteria can happen in a…


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