Not all bacteria are harmful. For example, yoghurt and cheese makers use bacteria to make their products. Bacteria like intestinal flora can be helpful to our bodies whereas E.coli can be harmful ...

Bacteria reproduce at regular intervals. An example might be every 20 minutes. This allows mathematical calculations to be made in order to predict how many bacteria will be present in a given time.

This wouldn’t be the first evidence of bacteria eating toxic alkaloids, she says, but examples from nature are rare. Some bacteria can break down caffeine, for instance. Also, microbes in the ...