An organism that serves food to other organsims 

an organism that consumes for energy. 

An organism that breaks down things.

long chain of amino acids.

organic compound in food and living tissue 

naturally occurring molecules that include fats, waxes, sterols, fat-soluble, vitamins.

 class of lipids that are a major component of all cell membranes

chemical compound that transfers energy

large biomolecules, essential for all known forms of life.