Mode Of Nutrition In Bacteria

Mode Of Nutrition In Bacteria:
The Bacteria Need Energy For Their Different Activities Of Life.
On The Basis Of Nutrition Bacteria Are Divide Into Three Groups
1) Autotrophic  Bacteria
2) Heterotrophic   Bacteria
3) Symbiotic Bacteria

1) Autotrophic Bacteria:
Bacteria Which Synthesize Their Food From Carbon Sources Are Called  Autotrophic Bacteria
. They Get Energy From Sunlight
. They Are Further Divide into Two Groups 1) Photoautotrophs 2) Chemoautotrophs

1) Photoautotrophs:These Bacteria  Have Chlorophyll Dispersed In The Cytoplasm.
They Utilize The Atmospheric Co2 And Get Energy From Sunlight And Perform The Process Of Photosynthesis, But Use Hydrogen Sulphide Instead Of Water As a Source Of Hydrogen And Liberate Sulphur Instead Of oxygen.

2) Chemoautotrophs 
These Bacteria Do Not Use Sunlight as a source of energy. These Bacteria Get Their Energy From Ammonia, Nitrates, And Iron Compound. 

2) Heterotrophic Bacteria:
These Bacteria Can Not Synthesize Their Organic Food. They Get Energy By Decomposition Of Organic Compound.They Maybe Saprophyte Or Parasite


3) Symbiotic Bacteria:Some Bacteria Forms An Association With Other Organisms And Are Called Symbiotic Bacteria.It Is Of Two Type
a) Mutualism.
b) Commensalism.