Bacteria Morphology
Flagella move the cell by

spinning like a propeller
an individual flagellum beating in a whip-like motion
many flagella beating in a synchronous, whip-like motion
attaching to nearby particles and contracting

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Bacteria Morphology
Gram positive cells have a

second outer membrane that helps to retain the crystal violet stain
multiple layer of peptidoglycan that helps to retain the crystal violet stain
thick capsule that traps the crystal violet stain
periplasmic space that traps the crystal violet

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