We concentrate on glucose breakdown, since it dominates energy production in most animal cells.
converted to body heat
The amount of usable energy ("food") stored in the biomass of organisms is decreased because most of the energy taken in by consumers is used for movement or released as body heat. The percentage passed on is usually taken as 10%, although this is a very generalized average, and different ecosystems have varying efficiencies.
The carbohydrates are the main source of energy from the food you eat, becausethey are most easily converted to useable energy. Fats are the second energy source used.Proteins are the third and most difficult source to be converted to energy.
By plants
the sun
Solar energy.
All energy eventually turns to heat. No exceptions.
It gets converted into energy.
Algae
The Sun
The main fate of energy is for it to be lost as heat.
The Sun
producers