Asexual reproduction o Apomixis and diploid embryos o Vegetative reproduction

Asexual reproduction o apomixis and diploid embryos o

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Asexual reproduction o Apomixis and diploid embryos o Vegetative reproduction Runners/stolons Rhizomes Suckers Adventitious plantlets Somatic embryogenesis Asexual or Sexual? Sexual o Genetic recombination o Ecologically involved Insects Birds Mammals o Flower structure Microspores and pollen – in anther (male) – meiosis Pollen receptor – stigma (female) Petal – attract pollenators
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Sepal – sometimes attractive Andro = male Gyno = female Ecium = house All stamens = androecium All carpels = gynoecium All petals = corolla All sepal = calyx Sporophyte – makes male spores meiosis Embryo sac = female gametophyte Asexual = vegetative o Fast o Energetically efficient o Clonal spread Apomixis Parthenogenesis or agamospermy (“seeds without sex”) Asexual, because there is no fertilization Formation of an embryo from a parent ovule w/o fertilization o Typically increases number of seeds produced Many examples in nature invluding common plants such as dandelions Fragmentation Garlic Fragmenting from parent Stolons or runners horizontal stems Spider plant Clones growing from parent Rhizomes Horizontal underground stem Tubers
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