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Streak Plate
- functions to separate bacterial cells into isolated colonies
- establishes a concentration gradient of bacteria across an agar surface
- uses the quadrant method
Colonies
Visible growth on a solid surface starting from 1 cell
All cells are genetically identical
How to avoid contamination
- work near the flame
- keep your head back, away from the plate
- don't talk or breathe towards the plate
- when the plate is open, use your non dominant hand to tilt the lid, using it as a shield between the plate and your face
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