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Diatoms have cell walls composed of _____.

A. silicon dioxide
B. carbon dioxide
C. chitin

User Vivek MVK
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Answer: A. Silicon dioxide

Diatoms are unicellular algae that are found in the freshwater, brackish and marine water. These organisms exhibit cell wall that are made up of silica that is hydrated silicon dioxide. This type of cell wall is called as frustule. The cell wall is divided into two valves called as thecae.

User Ilovelamp
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