They put on coats.
Bacteria grows slower at colder temperatures. In room temperature, the bacteria will multiply quickly and create mold, but at lower temperatures, the bacteria grows slower, or wont even grow at all.
Lichens, mosses, and liverworts are a few...
There are a few different temperatures that allow you to grow bacteria. Warm temperatures tend to grow bacteria rather well.
Heat.
Not necessarily as some bacteria survive even in ice.
At higher temperatures.
troposphere
heat
High temperatures kill the most bacteria. These temperatures should be at least 160 degrees Fahrenheit in foods like many meats.
Bacteria will stop reproducing in temperatures under 0 degrees Celsius.
Bacteria, like all living organisms, function by means of a complicated series of chemical reactions. Chemical reactions happen differently when there is a large difference in temperature. Low temperatures have a particular danger, which is that water freezes and it expands when it freezes, which will cause it to rupture the cell membrane of the bacterial cell. High temperatures cause all sorts of new reactions to occur which would not occur at lower temperatures, and these new reactions will also destroy a cell, even more thoroughly than low temperatures will. In less technical terms, high temperatures will cook the bacteria.
Kinda