Practice question
Question
An aquatic microscopic organism floats passively with plankton and possesses two overlapping silica-containing wall layers. Which ecological and economic conclusion follows?
Explanation
Diatoms are photosynthetic plankton and are described as chief producers in oceans. Their silica-containing walls accumulate to form diatomaceous earth, which is used in polishing and the filtration of oils and syrups.
Discussion
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