conifers - Conifers BIOL 1407 Seed Plants Vascular Tissue...

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Conifers BIOL 1407
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Seed Plants Vascular Tissue Produce seeds Dispersal of offspring Produce pollen Sperm transfer without water
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Seed Plants Sporophyte dominant Gametophytes Greatly reduced in size Dependent on sporophyte
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Seed Plants Heterosporous Megaspore Grows into female gametophyte eggs Microspore Grows into male gametophyte sperm Photo Credit for Ovulate Cone: Dr. Stephen Bostic, ACC Circled area: Ovule
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Pollen Production Pollen cones have microsporophylls Each microsporophyll has microsporangia Photo Credit for Immature Male Pine Cones: Menchi, Wikimedia Commons
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Pollen Production Meiosis occurs within microsporangia microspores Photo Credit for Staminate Cone: Dr. Stephen Bostic, ACC Microsporangium circled in red Microsporophyll at tip of yellow pointer Microspores circled in pink
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Pollen Production Microspores grow into male gametophytes Male gametophyte = pollen grain
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