Seed Plants

Seed Plants - Only 1 species survives today S Usually only...

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Among plants, these include the gymnosperms and angiosperms
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Sporangia Seed plants have 2 types: megasporangium, microsporangium S Protection of egg Non- seed plants utilize an archegonium on the gametophyte to protect egg, sporophyte develops within archegonium Seed plants protect entire gametophyte within ovule (which will develop into seed) S Transport of male gametophytes Non-seed plants – use water for flagellated sperm Seed plants – male gametophyte carried by wind (pollen) S Sporophyte vs. gametophyte Non-seed – sporophyte dependent on gametophyte Seed – gametophyte dependent on sporophyte
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“Naked Seed” Ovules and seeds of gymnosperm are exposed on cone scale S Microsporangia and megasporangia located on different cones, sometimes different plants
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Cone-bearing, palmlike plants found mainly in tropical and subtropical regions
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Unformatted text preview: Only 1 species survives today S Usually only male trees are used since female trees produce smelly seeds Can grow as shrubs, trees, or vines Largest group of gymnosperms S Evergreens – pines, hemlocks, spruces S Nonevergreens – cypress tree Female S Male Pollen Grain Embryo Sac Simple Fruits (develop from single ovary) Fleshy fruits Drupes – cherry Berries – grape, tomato Pomes – apple Dry fruits Legumes – pea Samaras – maple Nuts – oak, walnut Grains – wheat, corn Achenes -- sunflower, dandelion S Aggregate Fruits (develop from numerous ovaries within a single flower) Blackberries Raspberries Strawberries S Multiple fruits (develop from a number of ovaries of several flowers) Pineapples Mulberries Figs...
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Seed Plants - Only 1 species survives today S Usually only...

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