The kingdom is Protista, which includes simple eukaryotic organisms.
protistiaprotista
The most diverse kingdom is likely Animalia.
Using the US (six kingdom) model, the order would be Bacteria Archaea Protista Fungi Plantae Animalia *(protists are arguably a diverse and polyphyletic group, which will likely be phased out in any new hierarchy of living things)
Eubacteria
in the kingdoms
Rain Forest (: (Novanet)
There are more classes of organisms, since it is the most specific of the three.
Water is the most abundant compound in living organisms.
Structures and Features
Diverse organisms in a large region.
Where are you most likely to find the largest number of living organisms?
No. Most hydrocarbons are not found in living organisms.