Question

How do bacteria obtain their nourishment?

Answer 1

The different modes of nutrition observed in bacteria are:
1. Autotrophic mode of nutrition - synthesize their own food.

• Photoautotrophs - has chlorophyll, light energy is used to manufacture food.
• Chemoautotrophs - energy is obtained by oxidation of inorganic compounds.

2. Heterotrophic mode of nutrition - Organic compounds serve as the main source.

• Saprophytes - grow and mature on dead, decaying organic matter.
• Parasites - nutrition obtained from living host where they inhabit.