salt
A very small living thing is called a micro organism or a microbe, micro organism can be spelt with a hyphen (-) or just as two words, a living thing is called an organisms
A microscope ...
A microscope.
micro organism (sp?)
A living organism
A contrast or optical microscope.
an living organism
A micro organism is a living thing that is very small that you need a micro scope to see them.
living organism
An organism living in another organism is called parasite.
A non-living organism is a dead organism.