Assertion: diatom | /r/HasProperty | microscopic
Facets:
Source sentences:
text: Diatoms are microscopic, single-celled, or colonial plant-like organisms, whose cell walls are composed of silicon dioxide (silica).
text: Most diatoms are microscopic, but some species are as long as 2 millimeters.
text: Most diatoms are microscopic, but a few species are up to two millimeters in length.
text: Diatoms are microscopic, single-celled algae with cell walls composed of silica.