Algae
Which of the following algal divisions is characterized by possession of chlorophylls A and B, starch as the energy storage material, cellulosic cell walls and live in freshwater and marine habitats?

Chrysophyta
Chlorophyta
Pyrrophyta
Phaeophyta

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

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