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A2 Biology Coursework Investigation into the effect of varring the concentration of toxic metal ions on the percent germination of seeds. Task Brief A client may miles away has a problem germinating and establishing new plants, mainly grasses, on localised areas of a large waste ground site. The areas appear to be random in terms aspect, distribution and visible abiotic factors. The remainder of the site is highly fertile. It is believed the site was once an open cast ore mine, changed to a dump and now disused. Investigate the client's problem in the laboratory. Soil analysis is unavailable. Aim: To determine the effect of a range of concentrations of toxic mineral ions on the germination rates of seeds and the difference in the effects of different metal ions. Introduction: Seed structure A seed develops from the fertilized ovule. The main parts to a seed are the embryonic plant and its supply of food. The embryo consists of an embryonic shoot (plumule),...

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