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There is only one document for Lab 12 and I'm not sure the-(Answered)


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There is only one document for Lab 12 and I'm not sure the answers are a good guide. Can you please look it over and tell me if it's right or provide any corrections? Doc and lab uploaded



Biology Concepts


Lab 12: Population Ecology


ATTENTION: DO NOT CLICK SUBMIT until you have answered every


question! Scroll down to access questions.


This assesment is worth 100 points.


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)b. According to the actual


count, how many sunflowers were in the plot? (2 points)--Answer below:


2. Briefly explain why biologists use sampling, rather than counting all members of the population


of interest. (5 points)--Answer below:


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)--Answer below:


4. 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 above. 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)--Answer below:


5. 5. Refer to Part B of the procedure (population density).a. List the two locations visited for the


procedure. (2 pts)b. Which location had the higher population density of weeds? (1 pts)c.


Provide an explanation for why the location listed in question 5b had a higher population density


of weeds. (2pts)


6. 6. What physical and biological factors control the population density of each type of plant in


location 1? (5 points)--Answer below:


7. 7. Returning to the exact same plot six months later, would the population densities of either


plant change? Explain. (5 points)--Answer below:


8. 8. What methods would be used to estimate animal populations? Why? (5 points)--Answer




9. 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)--Answer below:


10. 10. What is the name of the type of growth yeast exhibit? (5 points)--Answer below:


11. 11. Is yeast an r-selected or K-selected species? (1 point)--Answer below:


12. 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.e.--Answer below:


13. 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.-Answer below:


14. 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)--Answer below:



15. 15. What is the general relationship between population growth and the increase or decrease of


resource use? (5 points)--Answer below:


16. 16. Give two examples of density-dependent limiting factors. (4 points)a.b.--Answer below:


17. Explain why population growth in the human population does not seem to be affected by


limiting factors. (6 points)18. 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? (20 points)--Answer below:.




Paper#9257611 | Written in 27-Jul-2016

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