Micro-Organisms

Micro-Organisms

1. very small organisms

   • cause disease and things to rot and decay
   • threetypes
     • viruses
     • bacteria
     • fungi

2. Viruses

   • chemical which can reproduce
     • surrounded by protein coat
   • Do not feed respire grow or move only reproduce
     • can only produce inside living cells-they all cause disease
   • can only reproduce inside living cells
   • cold, flu, measles
   • white cells make antibodies

3. Bacteria

   • living cells so they feed move and respire aswell as reproduce
   • water, soil and they are harmless
   • Benefits
     • Soil nutrients
     • Decay of waste
     • Cheese
     • Yoghurt
     • Silage
   • Harmful Effects
     • Disease
     • Food spoilage
     • Tooth Decay

4. Fungi

   • Occur in single cells eg. yeast
     • or fine threads eg. bread mould
       • or large structures eg.mushrooms
   • live on dead things
   • Parasites cause disease
   • Benefits
     • Brewing
     • Baking
     • Food
     • Antibiotics eg Penicillium
   • Harmful Effects
     • Disease
     • Foodspoilage
     • Enter text here

5. Humus

6. Biotechnology