Required Lifecycles and OtherImportant Diagrams & ChartsProfessor Thomas CarlsonBio 1B Plant SectionFall 2008Life Cycles Required for Bio1B Plant/Fungi Midterm ExamRequired Life Cycles•Basidiomycete Fungal Life Cycle (Fig 31.19, 31.5)•Clamydomonas (unicellular Green Algae) Life Cycle (Fig 28.22)•Alternation of Generations (Fig 29.5)•Ulva (multicellular Green algae) Life cycle•Laminaria (multicellular Brown algae) Life Cycle (Fig 28.18)•Bryophyte (non-tracheophyte) Moss Life Cycle•Fern (non-seed Tracheophyte) Life Cycle•Pine Gymnosperm Life Cycle (Fig 30.6)•Angiosperm Life Cycle (Fig 30.10, 38.2, 38.3, 38.5, 38.7)XSporophyte dependent ongametophyteXXSperm with flagellaXIndependent sporophyte& gametophyteXXXDiploid DominantXXGametophyte dependenton sporophyteX animals & windX mainly windPollinationXX gnetophytesVesselsXXXTracheidsXDouble fertilization &Triploid EndospermXXAntheridiumXXXArchegoniumXFlowers/FruitsXXSeedsXXPollenXX X aquatic fernsHeterosporous withheterosporangiaXXWater required forfertilizationXHaploid DominantX XXXAlternation ofGenerationsAngiospermsGymnospermsPteridophytesBryophytestcarlson@berkeley.edu09/01/08ANGIOSPERM LIFE CYCLE (Fig 30.10) Flowering Plant Flower Carpel (megasporophyll) Ovule (megasporangium) Megasporocyte = Mother cell = Diploid precursor cell Megaspore Megagametophyte (7 cells with 8 nuclei) Egg with 2 synergid cells near micropyle Two polar nuclei cell Egg (ovum) Flowering Plant Flower Stamen (microsporophyll) Anther with 4 chambers (4 microsporangia) Microsporocyte = Father cell = Diploid precursor cell Microspore Pollen grain: 2 celled pollen grain with 1 vegetative cell & 1 generative cell Mature microgametophyte has 3 cells: pollen tube cell develops from vegetative cell & 2 sperm develop from generative cell
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