Which of the following best describes the shape of Spirillum bacteria?

What characteristic distinguishes Spirillum bacteria from other bacterial shapes?

Which of the following statements is true about Spirillum bacteria?

Which of the following environments are Spirillum bacteria most likely to be found in?

Spirilla are rigidly spiraled shaped bacterial cells.

University of Michigan - Ann Arbor

University of Wisconsin - Madison

Tulane University

Bacteria can be classified based on their different morphologies.
- Coccus
- Bacillus
- Vibrio
- Coccobacillus
- Spirillum
- Spirochete

Cell Morphologies

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These bacterial cells lack a cell wall, thus they do not have a stable shape. They may appear as round bodies or interlacing filaments. 

Mycoplasmas

Coccus bacteria are round and spherical in shape.

Coccus

Bacterial cells that are rod shaped are bacilli. Bacilli are capable of forming endospores. 

Bacillus

These bacterial cells are curved rod shaped. 

Vibrio

Coccobacilli bacteria are short rod shaped bacteria. 

Coccobacillus

Spirillum

Spirochete cells are longer and helical spiral bacterial cells. They are members of the Spirochaetota phylum of bacteria.

Spirochete

Pathogenic bacteria are bacteria that can cause infectious disease.

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