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Ectotherm: An organism that relies on external sources of heat to regulate its bodt temperature.

Advantages of being an ectotherm:

  • Use less of their food in respiration.
  • Need to find less food and may be able to survive for long periods without eating.
  • Greater proportion of energy obtained from food can be used for growth.

Disadvantages of being an ectotherm:

  • Less active in cooler temperatures and may need to warm up


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