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SeedPlantsIntro213 - Seed-Dispersing Plants Introduction 1...

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Seed-Dispersing Plants Introduction- 1 The seed plants include the most successful plants in our earth's ecosystems today: the conifers and flowering plants, along with three other, less prominent, phyla. As we have discussed, the production of a seed, kept within an ovule for dispersal, gives a plant a distinct survival advantage over a single-celled spore, with the seed's nutrient-packed head start for the next generation and a variety of methods of dispersing to new locations. In addition, transporting sperm within a pollen grain frees the plant from the need for water for fertilization. Megaphylls, multi-stranded vascular leaves, provide more conduction and support for a larger surface area for photosynthesis. The ferns are the only spore- dispersing vascular plants that have functional megaphylls. As with all vascular plants, the dominant generation for the seed plants is the sporophyte generation. All seed plants are heterosporous. Heterospory often
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