explain the concept

explain the concept Choose the correct chronological order [lowest to highest] of production efficiency of the given animals: 1. mammals, fish, insects 2. insects, fish, mammals 3. fish, insects, mammals 4. insects, mammals, fish

Dear student,
The term production in 'Production Efficiency' is defined as the storage of biomass, while 'Efficiency' refers to the fraction of consumed biomass that ends up being stored in organism. 
Production efficiency of insects is relatively high and falls between 10-40%. Production efficiency of ectothermic vertebrates like fish and reptiles, is around 10%, and for endothermic mammals and birds, its value is in range of 1-2%.
So the order from lowest to highest is mammals, fish, insects. 
Hence, option 1 is correct.

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