Exam I.4

Home > Flashcards > Print Preview

The flashcards below were created by user DesLee26 on FreezingBlue Flashcards. What would you like to do?

  1. a.       Class Ulvophyceae, the Ulvophytes, Consists of Mainly Marine Species
                                                                  i.      Ulvophyeae
    1.       __, but important representatives are found in __
    a.       Most ulvophytes are __ or __, or they may be __ and __
                                                                                                                                          i.      Ulvophytes have a __ in which the __ persists; the __is persistent through __
    • Marine
    • fresh water
    • filamentous or composed of flat sheets of cells
    • macroscopic and multinucleate
    • closed mitosis
    • nuclear envelope
    • spindle 
    • cytokinesis
  2. 1.       The flagellated cells of ulvophytes are __ and __, like those of Charophyceae, but in contrast to motile charophytes, ulvophytes are nearly c__ and have __ resembling those of the chlorophytes
    2.       The flagellated cells may have __ as do those of Chlorophyceae
    The flagellated cells of charophyceae are always __
    • scaly or naked,
    • radially symmetrical
    • apical, forward-directed flagella
    • two, four, or many flagella
    • biflagellate
  3. 1.       Ulvophytes are the only green algae that have an __ with __ or a __, dominant life history involving __
    2.       One line of Ulvophyceae consists of __with __ cells
    • alternation of generations
    • sporic meiosis
    • diploid
    • gametic meiosis
    • filamentous algae 
    • large, multinucleate, septate
  4. a.       One genera of this group, Cladophora, is widespread in both salt water and fresh water, sometimes forming nuisance __, slimy and stinky, in freshwater habitats
                                                                                                                                          i.      Its filaments commonly grow in __, which are either free-floating or attached to rocks and vegetation
                                                                                                                                        ii.      The filaments __ and __ near the ends
    1.       Each cell contains __ and a __ with many __
    • blooms
    • dense mats
    • elongate 
    • many nuclei
    • single, peripheral netlike chloroplast
    • starch-forming pyrenoids
  5.                                                                                                                                       i.      Marine species have an __; most of the freshwater species however, do not have an __, apparently having lost this characteristic during the course of their __
    • alternation of isomorphic generations
    • alternation of generations
    • transition from marine to fresh water
  6. 1.       A second kind of growth habit among the Ulvophyceae is that of __
    a.       This familiar alga is common along __ throughout the world
                                                                                                                                          i.      Individuals of Ulva consists of a __ that is two cells thick, and a meter or more long in exceptionally large individuals                 
    • Ulva
    • temperate seashores
    • glistening, flat thallus
  7. 1.       The __is anchored to the substrate by a __ produced by extensions of the cells at its base
    2.       Each cell of the __contains a __ & __
    a.       Ulva is __, meaning one flagellated gamete is larger than the other; it has an __like that of many other Ulvophyceae
    • thallus 
    • holdfast 
    • thallus 
    • single nucleus and chloroplast
    • anisogamous
    • alternation of isomorphic generations
  8. 1.       The __marine algae, so-called because of their __cells, constitute additional evolutionary lines in the Ulvophyceae
    a.       They are characterized by very __ cells that are rarely __
                                                                                                                                          i.      The multinucleate cytoplasm is arranged around a __
    • siphonous 
    • tubular 
    • large, branched, coenocytic
    • septate
    • large central vacuole
  9. 1.       These algae, which are very diverse, develop through repeated __ without the formation of __, and consist of enormous single cells, some as long as a meter
    2.       Cell walls are produced only in the __. which are diploid with only gametes s haploid cells
    a.       Ex: codium
    • nuclear division
    • cell walls
    • reproductive phases of the siphonous green algae,
  10.                                                               i.      __is a spongy mass of densely intertwined __
    1.       Strains may be __, and nuisance growths of this seaweed spread in temperate zone
    a.       Caulerpa has become __
    b.      Ventricaria appears __, but is a large, __ attached to the substrate by several rhizoids
    c.       Another well known siphonous green algae is __
    • Codium 
    • coenocytic filaments
    • weedy
    • invasive
    • unicellular
    • multinucleate vesicle
    • Acetabularia
  11.                                                               i.      Halimeda and related genera of siphonous green algae are notable for their __
    1.       When these algae die and disintegrate, they play a major role in the generation of the __that is so characteristic of tropical waters
    a.       A number of genera of algae, including Halimeda, contain __ that significantly reduce feeding by herbivorous fish
    • calcified cell walls
    • white carbonate sand 
    • secondary metabolites
  12.                                                                                                                                       i.      Fronds of Halieda expand and grow rapidly at night, building up __ that __, which are active mainly during the day
    2.       Within an hour after sunrise the fronds turn from white to green as chloroplasts move __ from the __, or lower portions, of the __and begin to photosynthesize rapidly
    a.       At night, the chloroplasts move to the __, rendering the algae less appetizing to herbivore
    • toxic compounds that deter herbivores
    • outward from the interior
    • thallus 
    • interior of the thallus

Card Set Information

Exam I.4
2014-02-09 14:40:57
Plant Kingdom
Show Answers:

What would you like to do?

Home > Flashcards > Print Preview