Bacteria Morphology
Flagella move the cell by

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

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Bacteria Morphology
Gram positive cells have a

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

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