The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as

1. cyanobacteria

2. archaebacteria

3. chemosynthetic autotrophs

4. heterotrophic bacteria

Which of the following is incorrect about bacteria?

Chemosynthetic autotrophic bacteria does not help in recycling of

Chemosynthetic bacteria does not use which inorganic substrate?

Chemosynthetic autotrophs derive energy by