GYMNOSPERMS - SEED PLANTS GYMNOSPERMS - no outer covering...

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SEED PLANTS GYMNOSPERMS ANGIOSPERMS - no outer covering on seeds; “naked seeds” - many have winged seeds - no flowers - dominant sporophyte phase - “covered seeds”/fruit (fruit is any fleshy material containing seeds; its purpose is seed dispersal) - flowers (purpose is to increase chances of pollination) - dominant sporophyte phase Bumps on pollen are for aerodynamics IMPORTANT ADAPTATIONSOF TERRESTRIAL PLANTS: 1. Dominant sporophyte phase Protects from ionizing radiation (this would kill haploid organisms) 2. Pollen 3. Seed Have three distinct generations: 1. Seed coat – old sporophyte, from paternal 2. Embryo – new sporophyte 3. Endosperm – gametophytic tissue, haploid, provides initial energy for plant (acts as a food source) GYMNOSPERMS All have airborne pollen Put energy into making lots of pollen A. Division Cycadophyta
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Cycads From the age of dinosaurs B. Division Ginkophyta Planted in cities because they have good pollution tolerance Have triangular leaves that are formed by the fusion of needles
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GYMNOSPERMS - SEED PLANTS GYMNOSPERMS - no outer covering...

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