Ownclasses

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

  • Cyanobacteria

  • Archaebactera

  • Chemosynthetic autotrophs

  • Heterotrophic bacteria

Answer

D.

Heterotrophic bacteria

Heterotrophic bacteria are most abundant in nature. Many of them have a significant impact on human affairs. These are helpful in making curd from milk (e.g., Lactobacillus sp.), production of antibiotics (e.g., Streptomyces sp.) and fixing nitrogen in legume roots (e.g, Rhizobium spe).

Heterotrophic bacteria are most abundant in nature. Many of them have a significant impact on human affairs. These are helpful in making curd from milk (e.g., Lactobacillus sp.), production of antibiotics (e.g., Streptomyces sp.) and fixing nitrogen in legume roots (e.g, Rhizobium spe).