Abstract
Respiration releases energy from breakdown of glucose
Plants can convert glucose into many other organic molecules, usually starch stored in leaves, roots or other organs. Some converted into sugars (like fructose or sucrose) used to make cellulose in cell walls.
Plant cells can convert glucose into lipids needed to make cells' membrane
Contain only three elements carbon, hydrogen, oxygen (made from glucose)
But for amino acids, need nitrogen => get it from soil as nitrate ions (with other minerals: magnesium to make chlorophyll, phosphate to make DNA and ATP)
Feeding relationships
Food chain show feeding relationships, different stage = trophic levels
Clearer picture is a food web, linking several food chains
