Bacteria play a critical role in maintaining the planet's balance:
Bacteria are generally categorized by their shape and the composition of their cell walls: bacterium
The human body is home to trillions of bacteria, known as the . These "good" bacteria aid in digestion and protect against harmful pathogens. However, pathogenic bacteria cause diseases such as strep throat, tuberculosis, and urinary tract infections. These are typically treated with antibiotics , though the overuse of these drugs has led to the rise of "superbugs"—bacteria that are resistant to standard medical treatments. Bacteria play a critical role in maintaining the