2/1 bio notes cont'd

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2/1 bio notes cont'd
2012-02-07 00:21:20
bio notes

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  1. what are some uses of alginic acid?
    addtives in dehydrated products, gelling agents, impression (making materials in dentistry), emulsion (ice cream/cosmetics)
  2. characteristics of oomycetes
    unicellular and multicellular, lack chloroplasts, absorptive heterotrophs, decomposers, plant parasitic
  3. what are coenocytic with threadlike hyphae? ex: water mold on dead fish
  4. what does it mean when a cell is not divided into individual sections, 1 big cell with multiple nuclei
  5. what is the cell walls of fungi made of and what kind of cell are they?
  6. what is an oomycete and what are there cells walls made of?
  7. how are oomycetes distributed?
    freshwater, terrestrial (moist areas) (on land-downy mildew, on water- slime mold)
  8. what caused the potato famine in Ireland?
    phytophthora infestations
  9. what are the five clades of plantae?
    glaucophytes, red algae, land plants, chlorophytes, charophytes
  10. how were chloroplasts derived in plantae?
    primary endosymbiosis of a cyanobacterium
  11. what gave rise to alveolates and stramenopolies chloroplasts?
    secondary endosymbiosis
  12. what gave rise to excavate chloroplasts
    secondary endosymbiosis
  13. characteristics of glaucophytes
    unicellular, freshwater, photosynthetic pigments,
  14. what are the photosynthetic pigments of glaucophytes?
    chlorophyll a, carotenoids
  15. importance of glaucophytes
    only plant/alga group whose chloroplasts have peptidoglycan
  16. characteristics of red algae
    multicellular, filamentous or leaflike blades, marine, among deepest photosynthesizers, some of reef builders that secrete CaCO3
  17. what are the photosynthetic pigments of red algae?
    chlorophyll a and b, carotenoids, phycoerithryn (absorb blue wavelength of water)
  18. how does red algae store food?
    as floridean starches
  19. examples of red algae
    chondrus, polysephonia
  20. commercial uses of red algae
    carrageenan (thickener in ice cream), agar (microbial growth medium), nori (source of food in Asia)
  21. divisions of green algae
    chlorophytes, charophytes
  22. characteristics of chlorophytes
    unicellular or multicellular (colonial, filamentous or leaf like blades), photosynthetic pigment
  23. how do chlorophytes store food?
  24. how are chlorophytes distributed?
    marine (most), freshwater, and terrestrial
  25. what are the chlorophytes photosynthetic pigments?
    chlorophyll a and b, carotenoids
  26. what are important photosynthesizers (primary producers) in aquatic ecosystems
  27. examples of green algae
    chlamydomonus, pleurococcus, "moss", oedogonium (filamentous), volvox, ulva
  28. what characteristics are different in charophytes than in chlorophytes?
    unicellular or multicellular filaments, freshwater and terrestrial,
  29. what is the importance of charophytes?
    closest relatives to land plants ex: spirogyra, chara