How do bacteria obtain their nourishment ?

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Solution

Modes of nutrition in bacteria:

Autotrophic bacteria: Able to synthesize their own food
a. Photoautotrophs: Contain chlorophyll and use light energy for the synthesis of food
b. Chemoautotrophs: Obtain energy by oxidizing inorganic compounds

Heterotrophic bacteria: Require organic compounds as their main source
a. Saprophytes: Grow on dead and decaying organic matter
b. Parasites: Obtain their food from living host on which they grow

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