What methods can be used to isolate bacteria? (Check all that apply.) Check All That Apply Quadrant streak plateQuadrant streak plate Bright field microscopyBright field microscopy Loop dilutionLoop dilution Use of selective mediaUse of selective media Spread plateSpread plate Gram stain

Explanation:

Quadrant streak method is used to separate pure agar plate colonies.

Loop dilution is a dilution technique in which inoculum is diluted every time we sterilise the loop followed by placing on agar plate which helps to isolate pure colonies.

Selective media encourages bacterial growth. Selective media is one that has added components to it that inhibit or prevent the growth of certain forms of bacteria and encourage the growth of desirable organisms.

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what is the question? is it 'what is one of the reasons that someone could be b12 deficent?