Bio 204 Exam
1. what major groups make up the stramenopiles: - Oomycota (water molds)- Chromobionata
(brown plants)
2. what is the major apomorphy of stramenopiles: the presence of minute, tubular hairs that
typically occur along a flagellum
3. what is the major economic and historical significance of the oomycotes: -
Oomycetes are economically important because they cause serious plant diseases, such as downy mildew and potato
blight.Potato blight caused severe famine in 19th century Ireland, prompting massive immigration to the US.
4. What is the difference between a zoosporangium and an oogonium?: -A zoospo-
rangium asexually produces zoospores. -An oogonium sexually produces zygotes known as oospores.
5. Name the apomorphies of the Chromobionta.: -presence of chlorophyll c and
carotenoids(yellow-ish brown accessory pigments) -store energy as either laminarin or chrysolaminarin oil
6. What are the cell walls of diatoms made of?: silica-based cell wall
7. What is a diatomaceous earth? What is its economic significance?: "Diatomaceous
earth" - the fossilized cell walls of diatoms. -It is mined and used as filters (eg., for swimming pools) & abrasive agents
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, (eg., metal polishes)
8. What is the primary cell wall component of the brown algae (e.g., kelp)? What
is its economic use?: Primarily, the cell walls are composed of algin, which is economically important as a
food emulsifier.
9. Name the diagnostic features of the Rhodophyta (red algae) with respect to
the photosynthetic pigments, storage compounds, and cell wall chemistry.: -
-Photosynthetic pigments: chlorophyll a&d and phycobilins (responsible for red color) -Storage Compounds: floridean
starch in the cytoplasm-Cell walls: in addition to cellulose, carrageenanand agar-lacks motile cells
10. What is the source and economic importance of agar? Of carrageenans?: agar:
used as media in microbiology/ emulsion stabilizercarrageenan: emulsion stabilizer
11. prepare a table:
12. What does it mean for a fungus to be saprobic?: it means feeding off dead and decaying
organic matter as a source of food and energy
13. Name the major apomorphy of the Fungi and where it occurs along the
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1. what major groups make up the stramenopiles: - Oomycota (water molds)- Chromobionata
(brown plants)
2. what is the major apomorphy of stramenopiles: the presence of minute, tubular hairs that
typically occur along a flagellum
3. what is the major economic and historical significance of the oomycotes: -
Oomycetes are economically important because they cause serious plant diseases, such as downy mildew and potato
blight.Potato blight caused severe famine in 19th century Ireland, prompting massive immigration to the US.
4. What is the difference between a zoosporangium and an oogonium?: -A zoospo-
rangium asexually produces zoospores. -An oogonium sexually produces zygotes known as oospores.
5. Name the apomorphies of the Chromobionta.: -presence of chlorophyll c and
carotenoids(yellow-ish brown accessory pigments) -store energy as either laminarin or chrysolaminarin oil
6. What are the cell walls of diatoms made of?: silica-based cell wall
7. What is a diatomaceous earth? What is its economic significance?: "Diatomaceous
earth" - the fossilized cell walls of diatoms. -It is mined and used as filters (eg., for swimming pools) & abrasive agents
1/3
, (eg., metal polishes)
8. What is the primary cell wall component of the brown algae (e.g., kelp)? What
is its economic use?: Primarily, the cell walls are composed of algin, which is economically important as a
food emulsifier.
9. Name the diagnostic features of the Rhodophyta (red algae) with respect to
the photosynthetic pigments, storage compounds, and cell wall chemistry.: -
-Photosynthetic pigments: chlorophyll a&d and phycobilins (responsible for red color) -Storage Compounds: floridean
starch in the cytoplasm-Cell walls: in addition to cellulose, carrageenanand agar-lacks motile cells
10. What is the source and economic importance of agar? Of carrageenans?: agar:
used as media in microbiology/ emulsion stabilizercarrageenan: emulsion stabilizer
11. prepare a table:
12. What does it mean for a fungus to be saprobic?: it means feeding off dead and decaying
organic matter as a source of food and energy
13. Name the major apomorphy of the Fungi and where it occurs along the
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