Which of the following statements is true about Bacillus bacteria?

What characteristic allows Bacillus bacteria to survive in harsh environmental conditions?

Which of the following best describes the shape and survival mechanism of Bacillus bacteria?

Which of the following is a defining feature of Bacillus bacteria?

The term bacillus (plural: bacilli) refers to prokaryotic cells that are rod-shaped, visually resembling long, rounded rectangles. Certain bacilli are also known for their ability to form endospores.

University of Michigan - Ann Arbor

Google

University of Wisconsin - Madison

Tulane University

Individual cells of a specific prokaryotic organism typically exhibit a characteristic shape, known as cell morphology. While thousands of prokaryotic organisms exist, only a handful of morphologies are commonly seen microscopically. These standard shapes include spherical (coccus), rod-shaped (bacillus), curved comma-shaped (vibrio), short oval-like rods (coccobacillus), long rigid corkscrews (spirillum), and loose, flexible helical spirals (spirochete).

Cell Morphologies

- Bacillus
- Diplobacillus
- Streptobacillus
- Palisade

Common Arrangements of Bacilli

Low G+C gram positive bacteria have less than 50% cytosines and guanines their genomes. This group of bacteria also contains many pathogens. They consist of many different bacteria: 
- Clostridia
- Lactobacillales
- Bacilli
- Mycoplasmas 

Low G+C gram positive bacteria

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

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

Pathogenic bacteria are bacteria that can cause infectious disease.

Pathogenic Bacteria

Which of the following bacterial morphologies is characterized by a spiral shape?

Which bacterial morphology is described as rod-shaped?

Which bacterial morphology is described as spherical in shape?

Which bacterial morphology is described as comma-shaped?

The term coccus (plural: cocci) is used to describe prokaryotic cells that possess a round, spherical shape.

Coccus

Bacillus

The term vibrio (plural: vibrios) is used to describe prokaryotic cells that are shaped like curved rods, closely resembling a long comma.

Vibrio

The term coccobacillus (plural: coccobacilli) refers to prokaryotic cells that appear as short rods, closely resembling ovals.

Coccobacillus

The term spirillum (plural: spirilla) describes prokaryotic cells that possess a long, spiral shape, visually resembling a corkscrew.

Spirillum

The term spirochete (plural: spirochetes) refers to prokaryotic cells that have a long, loose, and flexible helical spiral shape. They visually appear similar to spirilla but are noticeably more floppy. They are members of the Spirochaetota phylum.

Spirochete

The term diplobacillus (plural: diplobacilli) refers to a cellular arrangement consisting of a pair of rod-shaped cells.

Diplobacillus

The term streptobacillus (plural: streptobacilli) describes a cellular arrangement where rod-shaped cells, or rectangles, are connected to form a long chain.

Streptobacillus

The term palisade (plural: palisades) refers to a cellular arrangement of rod-shaped cells that form a V-shaped or L-shaped formation.

Palisade

Clostridia are endospore producing bacteria that can live in soil and sediment which can let them lie dormant for years. 

Clostridia

Lactobacillales is a low G+C gram positive bacteria that have bacilli and cocci bacteria: 
- *Lactobacillus*
- *Leuconostoc*
- *Enterococcus*
- *Streptococcus*

Lactobacillales 

Mycoplasmas are gram positive bacteria even though they lack a cell wall. They were identified by being gram positive because of their low G+C content genome. 

Learn Before

Related

Learn After