Microorganisms: Friend and Foe — Science STD 8 — Question
Gujarat BoardEnglish MediumSTD 8ScienceMicroorganisms: Friend and Foe2 Marks
Question
Microorganisms are considered as friends and enemies of human being.
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Answer
$-$Microorganisms are useful in many ways to human beings and other organisms.
$-$They are useful to make curd from milk, to prepare idli and dosa, to bring fermentation, to prepare antibiotics, vaccines, etc.
$-$Some microorganisms causes diseases like malaria, cholera, tuberculosis, typhoid, polio in human. Thus they are harmful also.
$-$So due to microorganisms usefulness as well as harmfulness, they are considered as friends and enemies of human being.
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