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state two economically important uses of hetrotrophic bacteria and archeobacteria
 (a) Economically Important Use of Heterotrophic bacteria:
(i) Preparation of curd
(ii) Production of antibiotics
(b) Economically Important Use of Archaebacteria:
(i) Methanogens are type of archaebacteria  present in the gut of ruminating animals. They are responsible for production of methane from ruminating animal’s dung.
(ii) Archaebacteria can live in the most harsh environments, like sulphur springs, volcano, etc. They are important as they give us a clue how life may have started when the earth was too hot or too cold.


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