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Ch 28 - The Plant Kingdom, seeded plants 1. docx

Ch 28 - The Plant Kingdom, seeded plants 1. docx - The...

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The Plant Kingdom: Seeded Plants Chapter 28 While most seedless plants are homosporous, all seeded plants are heterosporous, producing both microspores and megaspores Following fertilization – ovule (megasporangium) develops into a seed surrounded by a layer of sporophyte tissue which then develops into the seed coat Life Cycle Comparison Two Groups of Seed Plants Gymnosperms seeds are totally exposed or borne on the scales of a cone No ovary wall surrounding ovule (egg) Angiosperms flowering plants produce seeds within a fruit (a mature ovary)- protected Gymnosperm and Angiosperm Evolution Unlike bryophytes, ferns and other seedless vascular plants: Gymnosperms: Are vascular Produce seeds Produce wind-borne pollen grains Conifers and Pine Life Cycle Monoecious: Having male and female reproductive parts (gametophyte) on the same sporophyte plant.
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