Bacteria

Bacteria reproduce through (splitting in two). Because they reproduce so quickly—some species every 20 minutes—they evolve rapidly. This has led to the global challenge of antibiotic resistance , where "superbugs" evolve defenses against the drugs designed to kill them. 5. Shapes and Classification Scientists often classify bacteria by their shape: Cocci: Spheres (e.g., strep throat). Bacilli: Rods (e.g., anthrax). Spirilla: Spirals (e.g., cholera).

Your body hosts trillions of bacteria that help digest food, produce vitamins (like B and K), and train your immune system. bacteria

A protective layer made of peptidoglycan (a mix of sugars and amino acids). Bacteria reproduce through (splitting in two)

Unlike animal or plant cells, bacteria are . They lack a nucleus and membrane-bound organelles. Their structure typically includes: Spirilla: Spirals (e

Bacteria are nature’s recyclers. They break down dead organic matter and "fix" nitrogen in the soil, which plants need to grow.

A small percentage of bacteria are that cause disease by releasing toxins or damaging tissues. Famous examples include E. coli , Streptococcus , and Staphylococcus . These are typically treated with antibiotics , which work by disrupting the bacteria's ability to build cell walls or reproduce. 4. Evolution and Resistance

Tail-like structures for swimming and hair-like structures for sticking to surfaces. 2. The Good: Essential Life Support