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Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare3 Marks
Question
Microbes have various contributions to the human welfare. For example, lactic acid bacteria help in checking disease causing microbes in our stomach. With reference to this fact, state the contribution of different microbes in the process of digestion in ruminants.
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Answer

The evolutionary success of ruminants is based on the efficiency of their digestive system in extracting nutrition from low quality food or say cellulose, which is undigestible matter in other mammals. The key to the ruminant digestive system is the presence of symbiotic microorganisms in their stomach.
These microorganisms produce cellulase enzyme, which breaks cell walls of plant material to release fatty acid, which constitute a significant portion of overall energy budget input of a ruminant.

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