Aquatic macrophytes can be considered good biological indicators of pollution because: they are sensitive to pesticides, to organic pollution and to eutrophication.
Plants classification
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The first flowering plants 1.The most primitive living angiosperms 2.The shared primitive characters 3.Fossils of the most primitive angiosperms 4.Living.
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Dickens_The_Batlle_of_Life.doc
Plant Taxonomy
