If you can consider space a biome, I imagine that would be the place with the least amount of animals.
phylum
The Tundra is the least common biome.
Phylum includes the least variety of organisms. It is a higher taxonomic rank that groups together related classes and is below the domain and kingdom levels.
the biome that has the least temperature is TUNDRA
None. All organisms need water, at least every once in a while.
it is because the odds have increased, more organisms around means that there is a higher likelyhood that one of them will be able to survive and adapt to the change
tundra
desert
DESERTS
The world's youngest biome is the Tundra from what i heard hope this helped at least a little :/
The reason single celled organisms were do dominant was because they were the least complex creatures. As single-celled organisms evolve into more complex creatures, their requirements also become more complex and it becomes harder for them to survive.
The Tundra