Razan
Hetrotrophs: Cannot make their own food because they get energy from nutrients.
Photoautotrophs: They gain energy from photosynthesis and they're an example of cyanobacteria.
Chemoautotrophs: They break down and release organic compounds that have nitrogen or suffer.
Bacteria have many ways to survive in: Lack of water, high temperature change, and lack of nutrients.
The survival of bacteria
Endospores are dormant cells produced in response to harsh environmental conditions.
Bad conditions such as when the spore coat surrounds a copy of the cell’s chromosome and a small part of the cytoplasm.
Good conditions such as when the spore coat surrounds a copy of the cell’s chromosome and a small part of the cytoplasm.
How are mutations useful?
Genetic mutations can help bacteria survive when the environment is changing.
They allow genetic diversitiy in an asexually reproducing population.
They lead to changes like antibiotic resistance
Nutrient cycling and nitrogen fixation
Bacteria are decomposers so they return viral nutrients to the environment
Some soil bacterias fix nitrogen such as amino acid, DNA, and RNA synthesis
Normal flora
Did you know that our bodies are covered in bacteria inside and out? Normal floras have a symbiotic relationship with humans they prevent diseases, aid with digestion, and they make vitimans
Can bacteria be useful? If so how?
Bacteria is responsible for some food production such as cheese and yogurt.
Can be used to fight disease or produce antibiotics.
Can be used as commercial production of vitamins.
Disease-causing bacteria
A small percentage of bacteria can cause diseases.
Bacterias spread and multiply quickly when they are associated with infections and they spread to other parts of the body.
Bacteria can cause disease in two ways:
Bacteria secrete a toxin into the nervous system
Bacteria that secrete acids can cause cavaties in teeth
Bacteria cause diseases in plants and ruin crops
