Diatom cells have regular geometrical shapes. The shape is maintained faithfully, whatever the environmental conditions, because the cell wall contains a large proportion of hard, brittle silica, which is partially hydrated [(SiO2)m. nH2O] and non-crystalline.
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Answer:
Diatom cells have regular geometrical shapes. The shape is maintained faithfully, whatever the environmental conditions, because the cell wall contains a large proportion of hard, brittle silica, which is partially hydrated [(SiO2)m. nH2O] and non-crystalline.
Explanation: