A) diatoms
B) dinoflagellates
C) slimemoulds
D) None of these
Correct Answer: A
Solution :
Cell wall is extremely well preserved in diatoms which belong to Bacillariophyceae because their cells are characterized by having cell wall richly impregnated with silica. Deposition of dead diatom cells in ocean beds develop in to diatomaceous earth or diatomites.
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