Animals are multicellular, and they rely either directly or indirectly on other organisms for food. Within each kingdom, there are thousands of species. A species is a group of living organisms that can breed and reproduce offspring. For example, a beaver is a species. It can breed with other beavers and produce more beavers.
Scientists have a system for naming all the living organisms on earth.
The system was devised by a Swedish scientist named Carolus Linnaeus over 200 years ago. He gave organisms two-word Latin names. When scientists organize living organisms, they break them up into groups of decreasing size and separate them until they get down to the individual species. Let's look at the bobcat as an example.