EPP Written Answer Template

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University of Guelph *

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MISC

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Biology

Date

Feb 20, 2024

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docx

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7

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Effect of Pesticide Project – Written Answer Template Name and Student ID: The Effect of Pesticide Project is an individual assignment , completed and submitted individually to the EPP Dropbox by 10:00 PM on Friday November 27 th . Provide your answers below and submit this file (.doc, .docx, or .pdf) to the online Dropbox along with the EPP Data Analysis Template Excel file (.xls, or .xlsx). Make sure to submit all of your files in the correct format or you will get a zero for all marks associated with the incorrect file! See EPP Instructions for more details on submission requirements. PART I: HYPOTHESIS AND PREDICTION 4 marks Write a hypothesis and a prediction that logically extends from one of the research questions posed below and that you could test in this experiment. Make sure not to copy the example from the instructions! Research Question(s): What are the effects of pesticides on non-target insects? Which pesticide, synthetic or organic, is less harmful on non-target insects? Hypothesis: The synthetic pesticides are more harmful to non-target insect populations than organic pesticides due to their persistence on the environment. Prediction: If synthetic pesticides are more harmful to non-target insect populations and the synthetic pesticide’s were used at the same time as the organic pesticide then the synthetic pesticide would have a greater effect on insect populations over time. PART II: DATA COLLECTION AND ANALYSIS 176 marks Download the EPP Data Analysis Template Excel file (Week #8 Seminar EPP Assignment. Complete the spreadsheet by following the steps and questions in the Excel file and within the EPP Instructions document. Make sure to upload your completed Excel file to the EPP Dropbox in .xls or .xlsx format. Please use Arial, Times New Roman or Calibri 12-point font, with 1 or 1.15 spacing for all sections. Please do not alter the margins of the document.
Effect of Pesticide Project – Written Answer Template PART III: RESULTS 56 marks Untreated Organic Pesticide Synthetic Pesticide 0 2 4 6 8 10 12 14 Number of Individuals Time 0 Number of Individuals Time 1 Number of individuals This figure shows the relation between the total population of insects before and after treatment you can see that the untreated population goes up while both treated populations go down. Time 0 Time 1 Time 0 Time 1 Male Female 0 2 4 6 8 10 12 Untreated Organic Pesticide Synthetic Pesticide Number of individuals This figure shows the relation between the total population of insects before and after treatment while taking sex into consideration. In this figure you can see that the significant decline in treated populations is only in the females.
Effect of Pesticide Project – Written Answer Template Time 0 Time 1 Time 0 Time 1 Young Adult 0 1 2 3 4 5 6 7 8 Untreated Organic Pesticide Synthetic Pesticide Number of individuals This figure shows the relation between the total population of insects before and after treatment while taking developmental stages into consideration. In this figure you can see that only the significant decline in treated populations is only in the youth. Untreated Organic Pesticide Synthetic Pesticide 3.75 3.8 3.85 3.9 3.95 time 0 time 1 Body length This figure shows the relationship between treatment and body size of the whole population. In this figure we can determine that use of pesticides increase the variation of body size in a population.
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Effect of Pesticide Project – Written Answer Template Untreated Organic Pesticide Synthetic Pesticide 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 Time 0 Time 1 Body length(mm) This figure shows the relationship between treatment and body size of just male insects. In this figure you can see that use of pesticides doesn’t have a great effect Untreated Organic Pesticide Synthetic Pesticide 3.7 3.8 3.9 4 4.1 4.2 4.3 4.4 Time 0 Time 1 Body length(mm) This figure shows the relationship between treatment and body size of just female insects. In this figure you can see that use of pesticides increases body size in females.
Effect of Pesticide Project – Written Answer Template PART IV: ABSTRACT 10 marks The dairy bush on campus at the university of Guelph is full of different insects and we don’t want to harm non target insects by using pesticides. This lab was conducted to see what effects organic pesticides have versus synthetic pesticides to see what alternative would be better. Checks were made before and after treatment to see how the pesticides affected population size and population body size and whether sex and age were attributing factors. Three logs were set up adjacent to the dairy bush and were then populated by samples of bug species. The logs were examined, and data was taken on the insects, treatment was applied and later the logs were examined a second time. The results gathered determine that pesticides are most useful against young female bugs. Another determination could be that the organic and synthetic pesticides are almost just as bad as each other and no significant difference is made from using one or the other. This means we should use whatever pesticide is cheapest.
Effect of Pesticide Project – Written Answer Template PART V: DISCUSSION AND DATA INTERPRETATION 18 marks Why were the 3 treatments (plots) adjacent to (or abutting) the Dairy Bush? 2 marks The three treatments are adjacent to the dairy bush to see what the effects of the pesticides are before putting them in the environment. Why might the untreated plot have been included in the experimental design? 2 marks The untreated plot could have been included as a control to see what affect the pesticides had. You calculated the SD and SEM for leg or body length. Are these values different? If so, which values are smaller? Why or why not are the values different? 4 marks Standard deviation and standard error differ in the fact that standard deviation measures variability over a select sample whereas standard error estimates this variability over a population from isolated samples. The standard error tends to be much smaller because the length of the body is much larger then the variation of body length across a population. Did the results of the experiment support or reject your hypothesis and prediction outlined in Part 1? Briefly explain why or why not. 2 marks No the results of the experiment did not help support my hypothesis and prediction. In order to draw conclusions from my hypothesis, more time would be needed between time 0 and time 1 to see whether the synthetic pesticide was more harmful for longer.
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Effect of Pesticide Project – Written Answer Template After analyzing the data gathered from the experiment, what is a reasonable conclusion that you could make regarding the ecological, evolutionary and physiological effect (or impact) of the pesticides on the non-target insects? 4 marks After analyzing the data gathered from this experiment it’s reasonable to say that both pesticides have negative consequences, but neither is significantly less harmful then the other. They both lowered total population and raised average body length. This would change how the insects evolve in the future. They may become resistant to the pesticide and they may get larger Now that you have completed this assignment, state one strength and one weakness of the experimental design or data collected and provide a brief explanation of each. 4 marks Explanation of why Strength: It was easy to use the giga pan an analyse data Excel made it very easy to obtain and visualise data Weakness : Sample sizes The sample sizes are very small and may not show a good range for the entire population In addition to the above marks, the total marks for the assignment includes 4 marks allotted to writing (overall quality and clarity of writing, spelling and grammar, punctuation).