What is the common characteristic of bacilli bacteria?

Bacilli bacteria are characterized by their rod-shaped structure. This distinct shape is crucial for their identification and has implications for how they grow and reproduce. The rod-like form gives bacilli a larger surface area relative to their volume, which can be beneficial for nutrient absorption and waste expulsion. Understanding the morphology of bacilli is important in microbiology and cosmetology, as it can help professionals recognize types of bacteria that may impact skin and scalp health. The other shapes listed, such as curved, spherical, or spiral, describe different categories of bacteria—specifically, vibrios, cocci, and spirilla, respectively—further highlighting the unique identification associated with bacilli.