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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

BIO100

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

below:

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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