bio notes 2/13 real

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Anonymous
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135530
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bio notes 2/13 real
Updated:
2012-02-15 13:46:44
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bio notes
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  1. what are the 4 clades of seedless vascular plants?
    club moss, horsetail, whisk ferns, ferns
  2. club moss have?
    microphylls (simple scale-like leaves)
  3. what do horsetail, whisk ferns and ferns have?
    microphylls
  4. what does horsetail have that is impregnated with silica?
    reduced megaphylls that form whorls
  5. what is another name for horstails?
    scouring rush
  6. which clade has reduced or no megaphyll?
    whisk ferns
  7. what has megaphylls with branching vascular strands; emerge as fiddleheads (rabbit fern)
    leptosporangiate ferns
  8. describe the sporangia found in leptosporangiate ferns?
    found in clusters, thin walls 1 cell thick, protected by indusium
  9. applications of seedless vascular plants?
    club mosses were used as "flash powder" in photography in the 1800s.
  10. "living today"
    extant
  11. characteristics of seed plants?
    sperm doesnt swim to egg, has vascular tissue, secondary growth, gametophytes are greatly reduced, all are heterosporous, have seeds
  12. two types of vascular tissue?
    xylem, phloem
  13. what does xylem contain?
    tracheids and sometimes vessel elements
  14. which xylem has vessel elements?
    gnetophytes, angiosperm
  15. what is a growth that contributes to a growth in diameter?
    secondary growth
  16. what causes secondary growth?
    accumulation of xylem (wood)
  17. what are some advantages of secondary growth?
    provides support to grow taller, facilitates light absorption and seed dispersal,
  18. what plant is always woody?
    gymnosperms
  19. what develops while attached to sporophyte and is nutritionally dependent on it?
    gametophyte
  20. what are the 2 types of spores developed by meiosis (sporophyte 2n)
    microspore, megaspore
  21. what develops into tiny microgametophyte (pollen
    grain) which produces 2 sperm by mitosis.?
    microspore
  22. what is a male gametophyte that is dispersed by wind or animal?
    pollen
  23. develops into microscopic megagametophyte which
    produces 1 egg by mitosis which is retained in megagametophyte
    megaspore
  24. what is the fusion of sperm and egg?
    fertilization
  25. what are the 3 generations that seeds contain tissues from?
    seed coat, nutritive tissue, embryo
  26. what is developed from the integument of a parent sporophyte?
    seed coat
  27. what is developed from the female gametophyte?
    nutritive tissue
  28. what is the new sporophyte?
    embryo
  29. what are the advantages of seeds?
    protection, dispersal, nourishment, extended period of dormancy,
  30. what do embryos of seedless plants develop into?
    sporophytes that often die due to unstable conditions

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