Algae
Characteristics used to place algae into divisions include all of the following except

flagella number and location
All of these
form of storage material
accessor pigments used in photosynthesis

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Algae
Which of the following best describes the algae known as diatoms?

Cells have intricate shells of silicon dioxide with two halves
Cells have flagella and a light-detecting eye spot
Cells are encased in rigid walls composed of cellulose coated with silicon
Cells contain carotenoid pigments as well as chlorophyll A and B

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