0 a living thing that on its own is too small to be seen without a microscope
1 a living thing which on its own is too small to be seen without a microscope (= device that makes small objects look larger)
Inside each tubeworm, there is a colony of these microorganisms.
Microorganisms near the vents take in the chemicals and change them to energy.
The tubeworms use the energy produced by the microorganisms as food.
There are many questions about how the microorganisms got so high above the Earth, but one thing is certain: Life can make its home almost anywhere.
When they studied the air, they found microorganisms living there, including three new kinds, or species, never seen before.
These results suggest that differences between species have a strong influence on the potential for different microorganisms to be preserved by fossilization.
