Which of the following is an example of a Gra | vedclass

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(B) Gram-positive bacteria are characterized by a thick peptidoglycan cell wall that retains the crystal violet stain during Gram staining.$Firmicutes

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Firmicutes

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(B) Gram-positive bacteria are characterized by a thick peptidoglycan cell wall that retains the crystal violet stain during Gram staining.$Firmicutes$ is a phylum of bacteria,most of which have a Gram-positive cell wall structure.$Halophiles$ are archaea that thrive in high salt concentrations.$Spirochaetes$ are a phylum of Gram-negative bacteria with a unique helical shape.$Methanogens$ are archaea that produce methane as a metabolic byproduct in anoxic conditions.Therefore,the correct option is $B$.

Column-$I$	Column-$II$
$(A)$ Halophiles	$(I)$ Gram-negative bacteria
$(B)$ Thermoacidophiles	$(II)$ Inhabit extremely salty areas
$(C)$ Spirochaetes	$(III)$ Responsible for methane production
$(D)$ Firmicutes	$(IV)$ Survive in acidic and high-temperature conditions
	$(V)$ Gram-positive bacteria

Which of the following is an example of a Gram-positive bacterium?

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