Biology

• Water logged soil = less oxygen
• Azotobacter (Free living bacteria)


  Produce Ammonia from Nitrogen gas. Make amino acids. Release them when they die.
• Mutualisitic bacteria - Live in root nodules in peas and beans to obtain carbohydrates.
• Cytoskeletal structures are heavily involved in a variety of cellular activities: Strengthening and maintaining the structure of the cell. Providing support to cellular organelles and maintaining their position. Involved in movements of cellular material e.g. moving chromosomes during cell division.