1 Figure 19.5 Alternation of Generations. Key Haploid (n) Diploid (2n) Protonemata (n) “Bud” Male gametophyte (n) Female gametophyte (n) Gametophore Rhizoid.

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Presentation transcript:

1 Figure 19.5 Alternation of Generations

Key Haploid (n) Diploid (2n) Protonemata (n) “Bud” Male gametophyte (n) Female gametophyte (n) Gametophore Rhizoid Spores Spore dispersal Peristome Sporangium MEIOSIS Seta Capsule (sporangium) Foot Mature sporophytes Capsule with peristome (SEM) Female gametophytes 2 mm Raindrop Sperm Antheridia Egg Archegonia FERTILIZATION (within archegonium) Zygote (2n) Embryo Archegonium Young sporophyte (2n) Moss Life Cycle

3 Figure 19.9 Moss Life Cycle

Fern Life Cycle Key Haploid (n) Diploid (2n) MEIOSIS Spore dispersal Sporangium Mature sporophyte (2n) Sorus Fiddlehead Spore (n) Young gametophyte Mature gametophyte (n) Archegonium Egg Antheridium Sperm FERTILIZATION New sporophyte Gametophyte Zygote (2n)

5 Figure Fern Life Cycle

Microsporangium (2n) Microsporocytes (2n) Pollen grains (n) Pollen cone Microsporangia MEIOSIS Mature sporophyte (2n) Haploid (n) Diploid (2n) Key MEIOSIS Surviving megaspore (n) Pollen grain Megasporocyte (2n) Ovule Integument Ovulate cone FERTILIZATION Pollen tube Female gametophyte Sperm nucleus (n) Egg nucleus (n) Archegonium Seedling Seeds Seed coat (2n) Food reserves (n) Embryo (2n) Megasporangium (2n) Pine Life Cycle

7 Figure Pine Life Cycle

Fig Reproductive shoot (flower) Apical bud Node Internode Apical bud Shoot system Vegetative shoot Leaf Blade Petiole Axillary bud Stem Taproot Lateral branch roots Root system

Fig Carpel Ovule Sepal Petal Stigma Style Ovary Stamen Anther Filament

Fig MEIOSIS Key Microsporangium Microsporocytes (2n) Generative cell Anther Tube cell Pollen grains Microspore (n) Male gametophyte (in pollen grain) (n) Mature flower on sporophyte plant (2n) Haploid (n) Diploid (2n) MEIOSIS Ovule (2n) Ovary Megasporangium (2n) Megaspore (n) Female gametophyte (embryo sac) Antipodal cells Central cell Synergids Egg (n) Pollen tube Stigma Sperm (n) Discharged sperm nuclei (n) FERTILIZATION Germinating seed Embryo (2n) Endosperm (3n) Seed coat (2n) Seed Nucleus of developing endosperm (3n) Zygote (2n) Egg nucleus (n) Style Sperm Angiosperm Life Cycle

11 Figure Angiosperm Life Cycle

12 Figure Plant Diversity Summary

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