What is a frustule?
a. The by-product of photosynthesis in diatoms
b. The rigid cell wall of a diatom
c. A microscopic phage that attacks diatoms
d. A small appendage on a cyanobacteria
ANS: B
The frustule of a diatom is mostly made of silica which gives it characteristics like glass. It consists of
two valves or matched halves with perforations in it. Information can be found in the section Most
Phytoplankton are Photosynthetic Autotrophs
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Indicate whether this statement is true or false.
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