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

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

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

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

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