Assertion: diatom | /r/HasAspect | cell walls
Facets:
Source sentences:
text: Diatoms have cell walls made of silica, Each species has a distinct pattern of tiny holes in the cell wall (frustule) through which they absorb nutrients and get rid of waste.
text: A diatom does have a cell wall because even though it is common as an animal cell, diatoms are also found as plant cells in which all have cell walls.
text: Diatoms have glass like cell walls called frustules which are made of silica.
text: Diatoms have cell walls that are fortified with silicon dioxide making them very strong and quite resistant to change over time.