* Short Generation Time: Bacteria reproduce incredibly quickly, sometimes dividing every 20 minutes. This means they go through many generations in a short time, allowing for more opportunities for mutations to arise and be selected for. Mammals, with their much longer lifespans and gestation periods, have far fewer generations over the same time period.
* High Mutation Rate: Bacteria have a higher mutation rate than mammals. This means that new genetic variations arise more frequently in their populations, providing more raw material for natural selection to work with.
* Horizontal Gene Transfer: Bacteria can transfer genetic material directly between individuals, even if they are not related. This process, called horizontal gene transfer, allows bacteria to quickly acquire new traits and adapt to new environments. Mammals can only acquire new traits through vertical gene transfer (from parents to offspring).
In Summary: The combination of short generation times, high mutation rates, and horizontal gene transfer allows bacteria to evolve much more quickly than mammals.
