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 flagella and a light-detecting eye spot
Cells contain carotenoid pigments as well as chlorophyll A and B
Cells have intricate shells of silicon dioxide with two halves

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Algae
The number of flagella produced by motile cells in

members of the Rhodophyta is greater than members of the Phaeophyta
None of these
members of the Phaeophyta is greater than members of the Rhodophyta
members of the Rhodophyta is exactly or approximately equal to members of the Phaeophyta

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Algae
Number of flagella produced by motile cells in

None of these
members of the phaeophyta is greater than members of the Oomycota
members of the Phaeophyta is approximately equal to members of the Oomycota
members of the Oomycota is greater than members of the Phaeophyta

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