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##### Sunflower random sampling activity.

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**Question**

can you help me complete is lab;Attachment Preview;lab 12.docx Download Attachment;1.Review the results from the sunflower random sampling activity.;a.According to the random sampling method, how many sunflowers were in the plot? (2 points);Based on my data there are 1.9 sunflowers in a plot.;b.According to the actual count, how many sunflowers were in the plot? (2 points);When I actually counted them I found that 1.92 where in a single plot.;2.Briefly explain why biologists use sampling, rather than counting all members of the;population of interest. (5 points);Based on part a and b you can see that the random sample method is rather close to the actual;number. Biologists would consider the random sampling method due to the proximity alone.;Sampling allows you to estimate population in remote area as well as gage what a population;maybe without running the risk of skewing the data by double counting.;3. a.When using random sampling techniques, which type of dispersion is most effective? In;other words, which dispersion model will give the most accurate estimation of population;size? (2 points);b.Briefly explain why this would be the case. (4 points);4.In a forest that measures 5 km by 5 km, a sample was taken to count the number of silver;maple trees. The number of trees counted in the grid is shown below. The grids where the;survey was taken were chosen randomly. Determine how many silver maple trees are in this;forest using the random sampling technique. (5 points);7;3;5;11 9;5.Refer to Part B of the procedure (population density).;a.List the two locations visited for the procedure. (2 points);b.Which location had the higher population density of weeds? (1 point);c.Provide an explanation for why the location listed in question 5b had a higher population;density of weeds. (2 points);6.What physical and biological factors control the population density of each type of plant in;location 1? (5 points);7.Returning to the exact same plot six months later, would the population densities of either;plant change? Explain. (5 points);8.What methods would be used to estimate animal populations? Why? (5 points);9.From the yeast count activity, predict what the population count for yeast would be at 200;hours. Provide an explanation for the population count prediction (e.g. how did the student;arrive at this count?) (5 points);10.What is the name of the type of growth yeast exhibit? (5 points);11.Is yeast an r-selected or K-selected species? (1 point);12.List four factors yeast exhibit which are characteristic of the type of selection they exhibit;(see response for Question 11 above). (4 points);a.;b.;c.;d.;13.List five factors that influenced the population growth of the yeast in the container. Make;sure to include factors with a negative and positive influence, if applicable. (5 points);a.;b.;c.;d.;e.;14.On day three, half of the yeast population was removed from the container and placed in a;second container. An additional 2 grams of sugar were added to each container. Describe what;the expected growth rate would be for each container. (5 points);15.What is the general relationship between population growth and the increase or decrease of;resource use? (5 points);16.Give two examples of density-dependent limiting factors. (4 points);a.;b.;17.Explain why population growth in the human population does not seem to be affected by;limiting factors. (6 points);18.(Application): How might the information gained from this lab pertaining to Population;Ecology be useful to the student or how can the student apply this knowledge to everyday life as;a non-scientist? The application paragraph will be graded according to the rubric below. (20;points);View Full Attachment;Additional Requirements;Other Requirements;yeast population averages;0 hrs 9.6;24 hrs 20;48 hrs 78.3;72 hrs 106;96 hrs 58.3;120 hrs 30;location 1;a average 3 total 12;b average 1.5 total 6;location 2;a. average 2.25 total 9;b. average 1.5 total 6

Paper#16142 | Written in 18-Jul-2015

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