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14 Cards in this Set
- Front
- Back
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13. What morphological character (apomorphy) unites the Stramenopiles?
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Most of them have heterokont cells with 2 flagella: one whiplash and one tinsel (w/tubular hair).
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14. What group of Stramenopiles were formerly classified as fungi?
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Oomycota.
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15. What is a coenocyte?
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It is many nuclei per cell.
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16. What disease (give common name and name of genus), caused by an Oomycota, was responsible for the mass migration of 2 million Irish to the United States?
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The common name is Potato Bright and the name of the genus is Phytophthora infestans.
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17. Name at least two photosynthetic groups within the Strameopiles.
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Xanthophyta and Phaeophyta.
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18. How are the "Brown Plants" (Brown algae and close relatives) characterized with respect to:
a) chlorophyll type b) photosynthetic accessory pigments c) storage compound. |
a. They are chlorophyll a and c
b. They have two photosynthetic pigments: (carotenoids = yellow) and (fucoxanthin = brownish). c. They have two storage compounds: chrysolaminarin and oil. |
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19. What does "alternation of generations" mean (found in some Brown algae)? [Note: we'll cover this with Green Plants]
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It means two gametes from two different organisms (Gametophyte and Sporophyte) unite to produce a zygote.
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20. What compound found in the cell wall of brown algae is of economic importance and how is it used?
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The compound is algin (alginic acid) and it is used to as emulsifier in ice cream, soups, cosmetics, etc.
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21. What are the two morphological forms of diatoms?
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Centric and Pennate.
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22. Of what is the cell wall of diatoms constructed?
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It is constructed from two interlocking halves and it is composed of silica.
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23. What is diatomaceous earth and how is it used?
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It is fossilized, mined remains of diatom cell walls.
It is used for filtering and polishing swimming pods. |
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24. For the Red Algae, what is the: a) chlorophyll types; b) accessory pigments; c) storage compounds.
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a. The chlorophyll type is a and d
b. Accessory pigment is phycobilins. c. The storage compound is floridean starch. |
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25. What is the economic importance of the red alga Nori?
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It is edible and used to wrap sushi.
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26. What two compounds are found in the cell walls of red algae and what are their economic uses?
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Carrageenans and Agar. They are used as emulsifiers in foods and other products and also agar is used as microbiological medium.
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