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24 Cards in this Set
- Front
- Back
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Algae
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aerobic eukaryons which carry out plant photosynthesis
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Can algae be unicellular or multicellular? If so, is there any significant tissue differentiation?
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Algae can be unicellular, or multicellular with no significant tissue differentiation
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Do bacteria use a higher wavelength of light then algae?
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yes
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What is the basis to separate algae into groups?
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1. pigments found in their plastids
2. on food reserves 3. on cell walls |
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Phycology
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study of algae
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Green Algae
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a.k.a chlorophycophyta. contain chlorophyll a and b and photosynthetic pigments. store starch and oil and have cellulose in their cell walls
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Examples of Green Algae:
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Volvox, Ulva, Chlamydomonas, Chlorella, Beta- carotene, Xanthophylis
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What is the signifigance of Pleurococcus, Chlorella, and Chlamydamonas? (Green Algae)
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immotile and reproduce by simple cell division
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Is a sexual life cycle common in green algae?
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Yes, with motile isogametes
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Red Algae
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aka Phondophycophyta. red plastids and contain chlorophyll a and phycobilins as photosynthetic pigments. store Floridean starch (like glycogen) or cellulose with agar and carrageenan in their cell walls.
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Why is red algae important to microbiologists?
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commercial source of agar
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What do red algae produce that is a major source of food in the Orient?
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carrageenan
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Carrageen (little rock)
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food was first isolated in Ireland moss, no flagella
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Golden Algae
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aka Cyrysophycophyta. plastids are yellow, yellow green, or golden- brown. cjlorophyll a, c1/c2 pigments. store starchlike carbs and oils.
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What are some unicellular species of golden algae?
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Diatoms
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Diatoms
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Bacillariophycophyta. contain chlorophyll a and carotene pigments (like golden algae). store polysaccharides and oils and contain silicon embedded in a pectin matrix in their cell walls
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Are diatoms highly resistant to degradation?
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yes and contain the best microfossils
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What forms diatomaceous earth?
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accumulated silicon shells (cell wall) of diatom
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Diatomaceous earth
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used as a filter to clarify cloudy wines, fruit juices, insulator in steam boilers
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Euglenophyta
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aka euglenophycophyta. contain chlorophyll a and b as pigment store paramylon and oils. NO CELL WALL.. have elastic pellicle instead. All unicellular.
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Brown Algae
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aka Phaeophycophyta. contain chlorophyll a and c and xanthophylls such as fucoxanthin. store laminarin, fats and mannitol, a sugar alcohol. contain cellulose and a alginic acid in their cell walls. multicellular.
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Dinoflagellates
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aka Pyrrophcophyta. contain chlorophyll a, c1, and c2 and carotenes. store starch and oils with cellulose cell wals. red and abundant in tropical waters. cause red tides. reproduce by asexual cell division.
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What kind of toxin does dinoflagellates excrete?
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powerful toxin that is toxic to humans who eat shellfish fed on algae
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Lichens
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pronoun. Likens. composite organism consisting of an alga(or cyano/ bacterium) and a fungus growing together in symbiosis. association mutualisitc
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