Plant Evolutions PBIO1030
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This 5 page Class Notes was uploaded by Steven Hernandez on Friday September 11, 2015. The Class Notes belongs to PBIO1030 at Ohio University taught by Dr. Thompson in Summer 2015. Since its upload, it has received 49 views. For similar materials see Plants and People in Biomedical Sciences at Ohio University.
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Date Created: 09/11/15
Wednesday September 9 2015 PBIO Plant Evolutions Plant Evolution and Seed Production Millcos 0 years ago Gymnosperms Naked seeds Seeds not enclosed in an ovary Wednesday September 9 2015 Egg producers and pollen producers Pine tree is one of the most common examples of gymnosperms Angiosperms Seed develops from an ovule inside an ovary Flowers fruits other ways to disperse pollen Brings about the use of animals Plants developed to deter or attract certain animals Angiosperm Gym nosperm mlcropylo Intogunonts lntogunent ovary wal mgasporocyto Ma POVOCYquot fmlcdus Wednesday September 9 2015 Roots Purpose of roots absorb nutrients and minerals from the ground give the plant stability keep it from falling store photosynthesis products Can interact symbioticay with different kinds of bacteria and fungi to enhance production Some fungi like Mycorrhizae are effective at decomposition and make nutrients more available to the plant Wednesday September 9 2015 Pathogens and Things Bacteria among other pathogens can impact several elements of the plant growing process Can affect the leaves which prevent the completion of photosynthesis Components of the Shoot System Stems Holds up the leaves to do photosynthesis Support for plant as a whole Conduction of water and nutrients from the roots Conduction of photosynthates around the plant Leaves Photosynthesis Gas exchange through stomata for Photosynthesis and Respiration Store sugars Modified Systems Modified stems Stems that can do their own photosynthesis to reduce the amount of Support structure woody or herbaceous Conduction of water and nutrients from roots Conduction of photosynthates around plant Wednesday September 9 2015 Underground stems Tuber spherical storage potato cassava Rhizome horizontal and wollen ginger bamboo irises Modified leaves Brightly colored leaves to attract insects Gas exchange through stomata for photosynthesis and respiration Store sugars In some species Water storage herbivory deterrence Reduced to spines Contain prickles to deter herbivores Attachments Secondary compounds Attract pollinators or food Carnivorous plants venus flytraps that get part of their nutrients from insects
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