Sagot :
Answer:
Spiral bacteria, bacteria of spiral (helical) shape, form the third major morphological category of prokaryotes along with the rod-shaped bacilli and round cocci. Spiral bacteria can be subclassified by the number of twists per cell, cell thickness, cell flexibility, and motility
Explanation:
Bacteria are classified according to their shape, or morphology. Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli, and spiral-shaped bacteria are spirilla.
Spiral bacteria is found in the human stomach: the gastric helicobacters.
The spiral shape can appear in several forms: vibrio, spirillum, and spirochete. The metric unit micrometer (1/1,000,000 or 10-6 of a meter) is used to measure bacterial size.