Although many forms of bacteria are not capable of independent
movement, species such as the Salmonella bacterium pictured here can
move by means of fine threadlike projections called flagella. The
arrangement of flagella across the surface of the bacterium differs from
species to species; they can be present at the ends of the bacterium or
all across the body surface. Forward movement is accomplished either by
a tumbling motion or in a forward manner without tumbling. |
