The Role of Bacteria in the World
Aishwarya Addepalli & Sonja Feaster
-Plants need oxygen to grow.
-Nitrogen gas makes up 78% of the air, but plants can't take it directly from the air. They need to take in a different form of oxygen.
-Nitrogen-fixing bacteria take in nitrogen air and change it into a form that plants can use.
Bacteria in Food
-Every time you eat cheese, yogurt, buttermilk, or sour cream, you are also eating bacteria.
-Lactic-acid producing bacteria break down sugar in milk (Lactose).
-Bacteria can change lactose into lactic acid, and this preserves and adds flavor to the food.
-They are used to kill bacteria and other microorganisms.
-Many antibiotics are made by bacteria.
-It breaks down and uses sugar and carbohydrates.
-People with Diabetes do not make enough insulin.
-n 1970's, scientists discovered how to put genes into bacteria to produce human insulin (bacteria are separated from the insulin)
:( Harmful Bacteria
- Pathogenic bacteria get inside a host and take nutrients from the host's cells, harming the host in the process.
- We are protected from many bacterial diseases by vaccines and treated with antibiotics.
Diseases in other organisms
- Pathogenic bacteria attack plants, animals, protists, fungi and other bacteria.
- They can cause damage to fruit, grain, and vegetable crops.
- The disease in the picture show branch of a tree with bacterial disease called "fire blight".