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Lab assignment




Question;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)


Paper#62981 | Written in 18-Jul-2015

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