What is the importance of bacteria?

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(D) Bacteria play several crucial roles in nature and industry:$1$. They act as natural scavengers by decomposing organic matter,which helps in nutrie

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All of the above.

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(D) Bacteria play several crucial roles in nature and industry:$1$. They act as natural scavengers by decomposing organic matter,which helps in nutrient recycling.$2$. They are extensively used in the fermentation process for the production of various food items like curd,cheese,and vinegar.$3$. The genus $Streptomyces$ contains many species that are used to produce a wide range of antibiotics,which are essential for treating bacterial infections.

Column-$I$	Column-$II$
$(a)$ Ladybird	$(1)$ Methanobacterium
$(b)$ Mycorrhiza	$(2)$ Trichoderma
$(c)$ Biocontrol	$(3)$ Aphids
$(d)$ Biogas	$(4)$ Glomus

$a$. $Saccharomyces$ $cerevisiae$	$i$. Production of immunosuppressive agent
$b$. $Monascus$ $purpureus$	$ii$. Ripening of Swiss cheese
$c$. $Trichoderma$ $polysporum$	$iii$. Industrial production of ethanol
$d$. $Propionibacterium$ $sharmanii$	$iv$. Blood cholesterol lowering agent

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Match the columns:

Column-$I$ Column-$II$

$(a)$ Ladybird $(1)$ Methanobacterium

$(b)$ Mycorrhiza $(2)$ Trichoderma

$(c)$ Biocontrol $(3)$ Aphids

$(d)$ Biogas $(4)$ Glomus

Find the mismatched pair.

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