Discussion The highest concentration had the highest population at the end of the experiment, while the lowest concentration had the lowest population at the end of the experiment. 10%, 15% and 20% had very close averages throughout the experiment. The last day had a big influence on all of the graphs. Most of the experiments either went high up or low down on the last day. When you compare the various concentrations of K PO to the control they all grew, many of them exponentially. Research from "Duckweed Summary"ÃÂ showed that Duckweed grows under most conditions. The best way we could make this experiment more accurate it would be to improve it by eliminating the possible sources of error. The possible sources of error are, miscounting, mistakes in K PO and other organisms living in the petri dish besides duckweed.
Conclusion The hypothesis was shown to be true, because the results said that if there is more concentration of K PO then there would be more exponential growth.
Although my hypothesis was not completely true, I believe that if we added K PO to the duckweed then we would have considerable results, we did not, and some of the concentrations had less than others when it should be the other way around. I think this is because of the possible sources of error.
References Holt, Modern Biology, 1999, Texas, Holt