Revision Notes. Adaptation and Competition. Examples of extreme adaptations:

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11.5 Adaptation and Competition


  • To survive, organisms require a supply of materials from their surroundings and from the other living organisms there.

  • Organisms live, grow and reproduce in places where, and at times when, conditions are suitable.

Physical (abiotic) factors:

  • Light
  • Oxygen
  • Water
  • Temperature

Living (biotic) factors:

  • Food
  • Predation
  • Grazing
  • Disease
  • Competition – for:   food, light, water, space.

Competition in Animals

Animals often compete with each other for:

  • Food
  • Mates
  • Territory
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Competition in Plants

Plants often compete with each other for:

  • Light
  • Water from the soil
  • Nutrients from the soil


  • Organisms have features (adaptations) which enable them to survive in the conditions in which they normally live
  • The organisms that are best adapted to make use of their resources in a habitat are more likely to survive and increase in numbers
  • For example:
  • To be able to obtain a certain food better.
  • To make it more difficult for predators or grazing animals to catch them or eat them. eg thorns, poisons and ...

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