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Name the organisms which do not derive energy directly or indirectly from sun
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- Chemosynthetic bacteria
- Pathogenic bacteria
- Symbiotic bacteria
- Mould
Correct Option: A
Chemosynthetic bacteria do not require sunlight as a source of energy either directly or indirectly. The energy for the synthesis of food is obtained by the oxidation of certain inorganic substances present in the medium.
The chemical energy obtained from oxidation reaction is trapped in ATP molecules. The ATP is used in CO2 assimilation.
