The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are…
The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as
cyanobacteria
archaebacteria
chemosynthetic autotrophs
heterotrophic bacteria
Solution
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).