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The biotic factors of the experiment are the fish, plants, killifish, and heavy vegetation. The abiotic factors are the cages and the stream movement. Fish in the vegetation-heavy enclosures died. When oxygen is consumed by vegetation, fish become stressed out. This stress causes them to die as they do not eat in environments with dense vegetation. In the researcher’s experiment, some enclosures lacked vegetation. The enclosures that were not vegetation-heavy did not stress the fish out. The lack of dense vegetation in the center-stream enclosures allowed the fish to feed and grow. The killifish did not get into the center-stream enclosures due to the wiring of the cages. I would suggest the researcher to repeat the experiment, but place the cages with heavy vegetation in rapidly-moving areas to see if less of the fish die based off the stream. Then, I would also suggest her to repeat the experiment again, but place the center-stream enclosures in slow moving areas to see if the type stream has an effect on whether fish feed and grow.
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Salvador Luria and Max Delbrück on Random Mutation and Fluctuation Tests …show more content…
A small number of E. coli was put into culture tubes. After it grew for a while, experimenters placed equal amounts of the cultures onto agar infected with the virus called T1 phage. A researcher hypothesized that if changes occurred in response to contact with the selective agent, survivors would be allocated according to a Poisson distribution and the mean would be equal to the variance. However, the number of resistant colonies on each plate was significantly diverse and the variance was greater than the mean. Since the Poisson distribution projected moments inconsistent with the data, researchers concluded that mutations in bacteria are unsystematic instead of
The biotic factors of the experiment are the fish, plants, killifish, and heavy vegetation. The abiotic factors are the cages and the stream movement. Fish in the vegetation-heavy enclosures died. When oxygen is consumed by vegetation, fish become stressed out. This stress causes them to die as they do not eat in environments with dense vegetation. In the researcher’s experiment, some enclosures lacked vegetation. The enclosures that were not vegetation-heavy did not stress the fish out. The lack of dense vegetation in the center-stream enclosures allowed the fish to feed and grow. The killifish did not get into the center-stream enclosures due to the wiring of the cages. I would suggest the researcher to repeat the experiment, but place the cages with heavy vegetation in rapidly-moving areas to see if less of the fish die based off the stream. Then, I would also suggest her to repeat the experiment again, but place the center-stream enclosures in slow moving areas to see if the type stream has an effect on whether fish feed and grow.
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Salvador Luria and Max Delbrück on Random Mutation and Fluctuation Tests …show more content…
A small number of E. coli was put into culture tubes. After it grew for a while, experimenters placed equal amounts of the cultures onto agar infected with the virus called T1 phage. A researcher hypothesized that if changes occurred in response to contact with the selective agent, survivors would be allocated according to a Poisson distribution and the mean would be equal to the variance. However, the number of resistant colonies on each plate was significantly diverse and the variance was greater than the mean. Since the Poisson distribution projected moments inconsistent with the data, researchers concluded that mutations in bacteria are unsystematic instead of