Required Lifecycles and Other Important Diagrams Charts Professor Thomas Carlson Bio 1B Plant Section Fall 2008 Life Cycles Required for Bio 1B Plant Fungi Midterm Exam Required 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 tcarlson berkeley edu 09 01 08 Bryophytes Pteridophytes Alternation of Generations X Haploid Dominant X X Sporophyte dependent on gametophyte X Water required for fertilization X X Sperm with flagella X X Archegonium Heterosporous with heterosporangia Diploid Dominant Tracheids Vessels Pollination Pollen Gametophyte dependent on sporophyte Seeds Flowers Fruits Double fertilization Triploid Endosperm X Angiosperms X X Independent sporophyte gametophyte Antheridium Gymnosperms X X X X X aquatic ferns X X X X X X X gnetophytes X mainly wind X X X X X X X X animals wind X X X X X ANGIOSPERM LIFE CYCLE Fig 30 10 Flowering Plant Flowering Plant Flower Flower Carpel megasporophyll Stamen microsporophyll Ovule megasporangium Anther with 4 chambers 4 microsporangia Megasporocyte Mother cell Diploid precursor cell Microsporocyte Father cell Diploid precursor cell Megaspore Microspore Megagametophyte 7 cells with 8 nuclei Pollen grain 2 celled pollen grain with 1 vegetative cell 1 generative cell Egg with 2 synergid cells near micropyle Two polar nuclei cell Mature microgametophyte has 3 cells pollen tube cell develops from vegetative cell 2 sperm develop from generative cell Egg ovum Sperm
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