evolution of flowering plants

  1. angiosperms scientific name
    Magnoliophyta
  2. Angiosperms originated during
    early Cretaceaous period
  3. angiosperms account for ___% land plants today
    95
  4. angiosperm apomorphies
    • flowers
    • stmens with 2 lateral thecae
    • male gametophyte 3-nucleate
    • carpel and fruit
    • ovules with 2 integuments
    • female gametophyte 8 nucleate
    • endosperm and double fertilization
    • sieve tube members with companion cells
  5. a few living angiosperms still have leaf-like ____ Sporangia are located close to______
    • stamens
    • the center of the stamens
    • Magnolia
  6. ovules with two ingteguments
    bitegmic
  7. female gametophyte is __ nucleate
    8
  8. female gametophyte is called
    • megagametophyte
    • embryo sac
  9. monocots usually have ___ endosperm than dicots
    more
  10. one sperm cell fuzes with ___ and the other fuzes with ___ which develops ___
    • egg
    • 2 polar nuclei
    • endosperm
  11. endosperm
    nutritional tissue
  12. integument becomes
    seed coat
  13. _____ cells are found with seive cells
    albuminous
  14. _____ cells are found with sieve tube members
    companion
  15. vessel members
    • found in xylem tissue
    • distinguish hardwood of angiosperms from softwood of conifers
  16. abominable mystery
    Darwin's name for the sudden origin of angiosperms
  17. Angiosperm evolution during Cretaceous and Tertiary periods
    • Barremian
    • Aptian
    • Turonian
    • Maestrichtian
    • Oligocene
  18. Barremian Stage
    first monosulcate angiosperm pollen grains, characteristic of primitive dicots and monocots
  19. monocots
    one cotelydon
  20. Aptian Stage
    first tricolpate pollen grains which are found in more advanced dicots
  21. Turonian Stage
    angiosperm pollen more abundant than fern spores and gymnosperm pollen
  22. Maestrichtian Stage
    number of modern angiosperm orders such as Magnoliales, Hamamelidales, Ranunculales, and some monocots represented by fossil pollen and leaves
  23. Oligocene Stage
    pollen of the Asteraceae, an advanced dicot family, appears at the end of this stage
  24. angiosperms are thought to have evolved from ____
    single group of gymnosperms
  25. Angiosperms probably evolved from
    • seed ferns
    • pteridosperms
    • especialle order Caytoniales
  26. Seed ferns had
    • ovules semi-enclosed in small pouches (cupules) which might represent the beginning of the carpel
    • leaves with netlike pattern of venation
    • pollen tubes leading to the micropyle of the ovule
    • microsporangia that superficially resembled anthers
    • double fertilization appeared at some point
  27. most primitive living angiosperm
    Amborella trichopoda
  28. Amborella trichopoda features
    • no vessels
    • unisexual flowers with spiral perianth
    • laminar (leaflike) stamens
    • separate carpels
  29. Image Upload 1
    A theca B microsporangia
  30. Image Upload 2
    actinostele
  31. Image Upload 3
    amphiphloic
  32. Image Upload 4
    atactostele
  33. Image Upload 5
    COMPOUND PISTIL WITH THREE FUSED CARPELS
  34. Image Upload 6
    dictylostele
  35. Image Upload 7
    ectophloic
  36. Image Upload 8
    ectophloic
  37. Image Upload 9
    eustele
  38. Image Upload 10
    haplostele
  39. Image Upload 11
    LAMINA
  40. Image Upload 12
    ligule
  41. Image Upload 13
    PARIANTH PARTS
  42. Image Upload 14
    plectostele
  43. Image Upload 15
    protostele with microphyll
  44. Image Upload 16
    siphonostele with megaphyll
  45. Image Upload 17
    UNFUSED CARPEL, SIMPLE PISTIL
Author
rice2am
ID
264664
Card Set
evolution of flowering plants
Description
flowerz
Updated