Answer:
Answer is B. Can be identified and classified by differences in their flagellar proteins.
Explanation:
Pathogenic strains of bacteria are those strains that are capable of causing infections to other living organisms like plants and animals.
The flagella are regarded as thread-like appendages that are majorly for locomotion in bacteria. But recently, it has been discovered, that flagella also contribute to the pathogenic or virulence nature of the bacteria. This is done by invading the host surface through adhesion.
The flagella is known to contain or made up of structural and functional proteins , which is known as flagellin.
Therefore, the differences in this flagellin can be used to identify and classify the flagella of pathogenic strains of bacteria.
