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Flashcards

Angiosperms: Introduction

Usuário eliminado O usuário eliminou as informações de disciplina Inglês 57 flashcards

Angiosperms: Introduction

Flashcards do conjunto (57)

  1. 1What are angiosperms distinguished by?Flowers
    Fruits
    Extreme reduction of gametophyte generation.
  2. 2What are the two classes of angiophyta?Liliopsida
    Magnoliopsida
  3. 3What are the differences between monocotyledons and dicotyledons)Monocots:
    1 cotyledon in embryo
    parallel nervation of leaves
    Scattered vascular Bundles
    No true secondary growth
    Flowers have 3 petals
    Pollen has 1 hole (monoaperturate)
    Dicots:
    2 cotyledons
    Leaf has net-like innervation
    Vascular bundles in a ring
    Secondary growth from cambrium
    4-5 leaves on flowers
    Pollen has 3 holes (traperturate)
  4. 4What is a flower?Determinate shoot with growth of limited duration
  5. 5What are carpels?Megasporophylls
    Collection of female parts of the flower
  6. 6What are stamens?Microsporophylls
    Collection of male parts of a flower
  7. 7What is an inflorescence?Cluster of flowers dispersed in a definite pattern
  8. 8What are sporophylls?Modified leaves that bear sporangia.
  9. 9What are carpels?Megasporophylls that contain ovules that develop into seeds.
  10. 10What are stamens?Microsporophylls that develop into pollen grains.
  11. 11How many whorls does a flower have?4
  12. 12What is the perianth?2 whorls of sterile parts in a flower composed of the calyx and corolla.
  13. 13What is the calyx?the Sepals
  14. 14What is the corolla?petals
  15. 15What are tepals?When petals and sepals are similar in shape and colour.
  16. 16What is the androecium?Stamens
  17. 17What is the gynoecium?Carpals
  18. 18What is a pistil?Fused carpals
  19. 19Label this diagramLabel this diagramLabel this diagram
  20. 20Label this diagramLabel this diagramLabel this diagram
  21. 21What is an anther?4 sporangia on a filament
  22. 22Label this diagramLabel this diagramLabel this diagram
  23. 23Label this diagramLabel this diagramLabel this diagram
  24. 24Label this diagramLabel this diagramLabel this diagram
  25. 25What type of placentation is this?ParietalWhat type of placentation is this?
  26. 26What type of placentation is this?AxileWhat type of placentation is this?
  27. 27What type of placentation is this?Free centralWhat type of placentation is this?
  28. 28What type of placentation is this?ApicalWhat type of placentation is this?
  29. 29What type of placentation is this?BasalWhat type of placentation is this?
  30. 30What is a perfect flower?Flower with both androecium and gynacoecium
  31. 31What is a staminate flower?Male flower
  32. 32What is a carpellate flower?Female flowers
  33. 33What is a monoeciuos plant?Has unisexual flowers but both sexes are on the same individuals
  34. 34What is a dioecious plant?Have unisexual flowers on individual plants
  35. 35What is a complete flower?Has all 4 whorls (Corolla, Calyx, Androecium, Gynoecium)
  36. 36What is an incomplete flower?One or more whorls are absent
  37. 37What is a connate flower?Flower with parts fused together
  38. 38What is adnation?Whorls fused together
  39. 39What is an actinomorphic flower?Flower with radial symmetry
  40. 40What is a zigomorphic flower?Flower with bilateral symmetry
  41. 41What is a hypogynous flower?Flower below the ovary
  42. 42What is a perigynous flower?Flower surrounds ovary
  43. 43What is an epigynous flower?Flower is over ovary
  44. 44What is the exine pollen grain wall?The resistant outer wall composed to sporopollenin
  45. 45What is the intine pollen grain wall?The inner wall composed of cellulose and pectin
  46. 46What two cells make up the immature microgametophyte?The tube cell and the generative cell
  47. 47What is microsporogenesis?Production of 1-celled microspores within microsporangia
  48. 48What is microgametogenesis?Production of microgametophyte within microspore
  49. 49What is an ovule?Microsporangium containing a single megaspore surrounded by an integument
  50. 50How many divisions does it take to make an embryo sac from the megaspore?3
  51. 51Label this diagramLabel this diagramLabel this diagram
  52. 52Label this diagramLabel this diagramLabel this diagram
  53. 53What are the steps of pollination?1. Pollen is captured on stigma and hydrated
    2. Pollen germinates, pollen tube grows within style
    3. Tube reaches ovule, enters through micropyle and reaches synergid cell
  54. 54What are the steps of double fertilization?1. Pollen tube penetrates synergid
    2. First sperm nucleus fertilises the egg and creates zygote (2n)
    3. Second sperm nucleus fertilises the central cell with 2 polar nuclei (this triple fusion makes primary endosperm)
  55. 55What does the triploid central cell turn into?Endosperm, which provides food storage.
  56. 56WSeed
  57. 57What does the mature ovary become after fertilization?Fruit

Informações

Descrição
Angiosperm: introduction flash cards
Criado por
Usuário eliminado · dez 2016
Atualizado
10 dez 2016
Visualizações
23
Histórico
  • Criado por Shareef Akbari · 8 dez 2016
  • Copiado por Shareef Akbari · 9 dez 2016
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