A: Bacteria obtain energy by either ingesting other organisms and organic compounds or by producing their own food. The bacteria that produce their own food are called autotrophs. Bacteria that must consume other organic molecules for energy are called heterotrophs.
Nautical Mile vs. Mile. While mile is a unit of distance on land, a nautical mile is used to measure distances at sea. 1 nautical mile = 1.151 mi. Kilometer vs Mile.
So that comes in very handy for navigation. A nautical mile is 1,852 meters. All other miles are arbitrary dimensions (as is the meter) and are a bit less than a nautical mile and have some historical background, which explains, why there are differences between statute and imperial and other miles.