Describe the advantages and disadvantages of large-scale monocultures of crop plants

Describe the nitrogen cycle with reference to: • decomposition of plant and animal protein to ammonium ions • nitrification • nitrogen fixation by lightning and bacteria • absorption of nitrate ions by plants • production of amino acids and proteins • feeding and digestion of proteins • deamination • denitrification

Investigate and describe the effects on plant tissues of immersing them in solutions of different concentrations