Brassica Rapa Essay
An experiment conducted to find how various levels of acidity affected the growth of Brassica rapa. The common name for Brassica rapa is field mustard and a type of plant is a cabbage. The plant was grown in solutions of pH 3 and 5.6 and the control was a solution of pH 7. This was done over 3 weeks and the plants were measured every day at the same time. The results of growth from day 4 to day 10 were recorded and they show that the plant grew the most in the pH of 5.6 at first but by the 10th day, the plant in the solution of pH 7 had grown the most and the plant in the pH 5.6 solution survived and was not far behind but the solution with pH 3 died after the 6th day. Soon after the acid was added, the plant in pH 3 turned yellow and died after showing signs of stress. The plant in solution of pH 5.6 grew
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The minimum pH that duckweed can survive at is pH 4.5. An experiment was done to find out the effect of acid rain on the growth of duckweed and it was hypothesized that there would be fewer duckweed lobes when the pH was lower. There were 4 containers which contained pH solutions of 2,4,7 and 8 respectively. 15 duckweed lobes were added to each container and they were placed in equal light for 15 days. The pH 7 solution was the control. The duckweed that was in the solutions of pH 2 and pH 4 died immediately so they stayed at 15 lobes as they could not multiply. At pH 7, the duckweed multiplied slowly and ended up with 19 lobes at the end of the experiment. The duckweed in the pH 8 solution multiplied slowly at first but then reproduced quickly and ended up multiplying the most out of all the solutions. This shows that duckweed growth is affected by pH levels in the water. The lower the pH level, the slower the growth and at very low levels there is no growth at all. This means that duckweed in lakes and rivers will not function properly if there is acid rain and other aquatic plants will too be adversely
The minimum pH that duckweed can survive at is pH 4.5. An experiment was done to find out the effect of acid rain on the growth of duckweed and it was hypothesized that there would be fewer duckweed lobes when the pH was lower. There were 4 containers which contained pH solutions of 2,4,7 and 8 respectively. 15 duckweed lobes were added to each container and they were placed in equal light for 15 days. The pH 7 solution was the control. The duckweed that was in the solutions of pH 2 and pH 4 died immediately so they stayed at 15 lobes as they could not multiply. At pH 7, the duckweed multiplied slowly and ended up with 19 lobes at the end of the experiment. The duckweed in the pH 8 solution multiplied slowly at first but then reproduced quickly and ended up multiplying the most out of all the solutions. This shows that duckweed growth is affected by pH levels in the water. The lower the pH level, the slower the growth and at very low levels there is no growth at all. This means that duckweed in lakes and rivers will not function properly if there is acid rain and other aquatic plants will too be adversely