Rank the following from highest to lowest in terms of their
     Rank the following (from highest to lowest) in terms of their expected production efficiency: mouse, beetle, fox.  mouse > beetle > fox  mouse > fox > beetle  beetle > mouse > fox  beetle > fox > mouse  fox > mouse > beetle 
  
  Solution
beetle>mouse>fox
Production efficiency is equal to the production divided by the assimilation for animals. The \"production\" here refers to growth plus reproduction.
It measures how efficiently each trophic level uses and incorporates the energy from its food into biomass to fuel the next trophic level. Plants have the greatest net production efficiencies.
Production efficiency for ectotherms is ten times higher than for endotherms.

