Test Exam I.8 Red Algae

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Author:
DesLee26
ID:
260844
Filename:
Test Exam I.8 Red Algae
Updated:
2014-02-08 09:37:29
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Plant Kingdom
Folders:
Biology
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Mickle
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  1. Largely __, a few __; abundant in __/ Majrity tend to like __. 

    Usually __; individuals torn loose usually __; none are __.

    Some precipitate __ and become __; important contributor to __ (along with __)

    Deepest plant life found: __ (deepest photosynthetic organism around)
    • marine
    • freshwater
    • tropical waters
    • warmer water
    • attached to a substrate
    • die
    • free floating
    • calcium carbonate
    • calcareous
    • reefs 
    • corals
    • 800 feet
  2. Thallus is relatively simple; explain.
    • 2 genera unicellular
    • a few with an expanded thallus (flattened and bladelike)
    • most are filamentous; either a single branching filament or a central group of filaments (central strand) with numerous branches
  3. Contain only __ (no second type of chlorophyll) only group of true algae to contain __. 

    No __

    Most __, __, and __
    • chlorophyll a
    • phycobilins [like cyanobacteria] (mainly phycoerythin, sometimes a small amount of phycocynanin)
    • motile cells
    • diplobiontic, isomorphic, triphasic
  4. __ were ancestral to __, no questions asked.


    Stored food is __, which has what kind of glucose.
    Where is it stored?

    Cell wall
    - made of __
    - has __ (hold on to water)
    - what is located between two adjacent cells?
    • cyanobacteria
    • red algae
    • starch (floridian starch_ with alpha glucose
    • stored in cytoson

    • cellulose
    • hydrocolloids
    • pores between two adjacent cells that is plugged up
  5. Flagella

    - no __ (none on reproductive structures or adults)

    can be __, but some have several.
    flagella

    uninucleate
  6. Human Relevance of Red Algae 

    __: in some waters, the corralline algae are as important, if not more important than __ for __. 

    __: primarily in Asia, but their use is growing in the US
    a) __: sushi wrappers; total protein is __ of __.
    b) Japan-cultures this alga and produces __ of world's total production (__ seeded onto __)
    c) ~40000 tons/ year produced worldwide
    d) total market value (1993): $1.8 billion
    direct food source

    porphyra (nori)

    • 30-50%
    • dry weight
    • ~60%
    • propagules
    • nori nets
  7. __: was an important substitute for potatoes during the Irish potato famine of 1845-46. Its still gathered today.

    Occurs off both the Atlantic and Pacific coasts of North America

    Popular snack in Maine and Eastern Canada- "__"
    dulse

    Nova Scotia popcorn
  8. __, a carbohydrate extracted from cell walls, has properties similar to algin
    - Many uses industrialyl
    - Used mainly as an __, __, __, etc.

    Scientific uses:
    a) Used as a __ to __; organisms do not use the __ itself but use nutrients that have been added to the agar
    b) __- highly purified __, used in __ to separate proteins, DNA fragments (to produce DNA fingerprints)
    c) Good inert carrier for __, eg. antibiotics, vitamins, when slow release
    • base to culture bacteria, fungi,, plant cells, or meristems
    • agaar
    • agarose
    • agar
    • gel electrophoresis
    • encapsulating drugs
  9. __, a carb extracted from cell wall, has properties similar to __ and __
    - Principal sourc is __
    - Some species of red algae are cultured for their __.

    Uses: used mainly as a __(3)__
    Used mroe extensively in dairy foods than __.
    • carageenan
    • algin
    • agar
    • Chondrus crispus (Irish moss)
    • carageenan content
    • stabilizer, emulsifier, thickener
    • algin
  10. The __ of some red algal extracts have been tested and found to be highly toxic to many microorganisms. Also have adverse efffects on certain __(3)__. These toxins are __, unlike many insecticides.
    • antibiotic properties
    • nematodes
    • aphids
    • spider mites
    • biodegradable
  11. Some compounds found in red algae have demonstrated some __.
    eg: Halomon: Brain, renal (kidney), and colon tumor cell lines are the most sensitive to this compound.
    anti-cancer activity

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