What is the mode of nutrition in bacteria?

Bacteria exhibit two primary modes of nutrition:

1. Autotrophic nutrition – Bacteria that produce their own food through photosynthesis (like cyanobacteria) or chemosynthesis (like nitrifying bacteria).
2. Heterotrophic nutrition – Bacteria that depend on other organic matter for food, including decomposers (which break down dead organisms) or parasitic bacteria (which live off other organisms).
   Bacteria play a crucial role in the nitrogen cycle and decomposition in ecosystems.