MicrobesTiny living organisms, especially bacteria and viruses
Definitions:
Microscopic organism, especially a bacterium, virus, or fungus.
SymbiosisThe interaction between two different organisms living in close physical association, typically to the advantage of both
Definitions:
A relationship between two or more organisms that live closely together to mutual benefit.
EcosystemA community of living organisms and their physical environment
Definitions:
A biological community of interacting organisms and their physical environment.
ParasiteAn organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense
Definitions:
An organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the host's expense
BiodiversityThe variety of life in the world or in a particular habitat or ecosystem
Definitions:
Variety of life within an area or ecosystem.