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Unique Features of Reproduction in AngiospermsStructure and Evolution of FlowersoFlowers evolved in AngiospermsoMorphologyComplete flowersIncomplete floweroCaylx-outermost, protects flower budoCorolla- attract pollinatorsoGynoecium- female parts, consist of one or more carpels with OvulesoAndroecium- stamen male structures, most have a filament and an antherTrends in Floral specialization/symmetryoFusionoReductionoRedial symmetryoBilateral symmetryGamete ProductionoAlternation of generationsDiploids & haploid generationsPollen grainsMicrogametophytes- male or pollen grainsEmbryo SacMegagametophytes-female gramediphyteGametophytesoEmbryo sac8 nuclei7 cellsoPollen Grain-weather resistant walls for surface species for the species-tube cell andgenerative cell to produce two spermPollinationoSelf-pollinationEcologically advantageous in an environment without pollinators. Moregenetically similar. Not clones because meiosis is involved