Algae
Zooxanthellae are algal symbiont that live within coral reef animals. These algae belong to

rhodophyta
chrysophyta
chlorophyta
pyrrophyta

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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 intricate shells of silicon dioxide with two halves
Cells are encased in rigid walls composed of cellulose coated with silicon
Cells have flagella and a light-detecting eye spot

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Algae
Number of flagella produced by motile cells in

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

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