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In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

Loss of protected health information collected for research should be directly reported to:

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?