Which of the following best describes the metabolism of bacteria as...

Though the bacterial structure is very simple, they are very complexin behaviour. Compared to many other organisms, bacteria as a groupshow the most extensive metabolic diversity. Some of the bacteria areautotrophic, i.e., they synthesise their own food from inorganic substrates.They may be photosynthetic autotrophic or chemosynthetic autotrophic.The vast majority of bacteria are heterotrophs, i.e., they depend on otherorganisms or on dead organic matter for food.