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Chrysophytes

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Chrys­o­phytes
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Chrys­o­phytes

  • Mem­bers:
    • Diatoms
    • Gold­en algae (desmids)
  • Habi­tat:
    • Fresh­wa­ter and marine envi­ron­ments
  • Char­ac­ter­is­tics:
    • Micro­scop­ic
    • Plank­ton­ic (float pas­sive­ly in water cur­rents)
    • Most­ly pho­to­syn­thet­ic
  • Diatoms:
    • Unique cell walls:
      • Two thin over­lap­ping shells (like a soap­box)
      • Embed­ded with sil­i­ca (inde­struc­tible)
    • Form diatoma­ceous earth:
      • Accu­mu­la­tion of cell wall deposits over bil­lions of years
      • Grit­ty tex­ture used in pol­ish­ing, fil­tra­tion of oils and syrups
    • Chief pro­duc­ers in the oceans (major con­trib­u­tors to pri­ma­ry pro­duc­tion)

Test: Chrys­o­phytes

Check your knowl­edge from the top­ic: Chrys­o­phytes

1 / 5

Why are diatoms referred to as “chief pro­duc­ers” in the oceans?

2 / 5

Which of the fol­low­ing is NOT a use of diatoma­ceous earth?

3 / 5

What is “diatoma­ceous earth”?

4 / 5

What is a dis­tinc­tive fea­ture of diatoms’ cell walls?

5 / 5

Chrys­o­phytes are typ­i­cal­ly found in which type of envi­ron­ment?

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