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

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

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

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

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