A bacterial culture is treated with streptomycin and a cast is made. A few colonies are able to survive due to

Selection

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Adaption

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Mutation

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Mimicry

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Solution

The correct option is B Adaption
Adaptation is the alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment. The bacteria got adapted towards the changes and hence survived.
So the correct option is 'Adaption'.

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