Identify a spiral-shaped bacteria.

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Accepted Answer

Step-by-step reasoning:

1. Identify the shapes of the listed bacterial types:
   - Bacillus: rod-shaped (bacilli).
   - Coccus: spherical (cocci).
   - Vibrio: comma-shaped or curved rod.
   - Spirillum: rigid spiral or helical-shaped.

2. Map options to names: $a	o	ext{Bacillus},\ b	o	ext{Spirillum},\ c	o	ext{Coccus},\ d	o	ext{Vibrio}$.

3. The only option that is spiral-shaped is Spirillum, so the correct choice is option b.

FINAL_ANSWER: b

Answer

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