7. (a) What type of growth is shown on the graph in Figure 1 below? Number of individuals (N) 1 200 000 1 100 000 1 000 000 900 000 800 000 700 000 600 000 500 000 400 000 300 000 200 000 100 000 0 2 4 6 8 10 12 14 16 18 20 Time (months) Figure 1 (b) Explain how the population size is changing at point A and at point B. Why is the population size changing as it is? 8. A population has a growth rate of 9 % per year. What is its doubling time? 9. (a) What type of growth is shown on the graph in Figure 2 below? Population size 12 000 10 000 8 000 6 000 4 000 2 000 0 1 2 3 4 5 Time (years) Figure 2 (b) Explain how the population size is changing at point A and at point B. Why is the population size changing as it is?
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For the first question, we need to look at the graph in Figure 1. The population size is increasing rapidly from 100,000 to 700,000 in the first 10 months, then it slows down and reaches a plateau around 800,000 after 16 months. This type of growth is called Show more…
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The graph in the figure shows a population as a function of the date d. (a) Explain in general terms how the population N changes with time. (Which is the correct answer below)? The population grows rapidly at first and then the growth slows. Eventually, it levels off. (b) When does the population reach 300? d = (c) When is the population increasing most rapidly? d =
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Refer to the graph you made to answer the following questions, and include your answers on the same page as your graph: 1. Which of the two populations is declining more rapidly? (1 point) 2. In a few sentences, suggest TWO possible reasons why one population may be changing more quickly than the other, and explain why you think each reason would influence population size. (No outside research required - just think about what might influence how quickly a population size would change through time.) (2 points) 3. Use the equations of your trendlines to predict the year when each location's population is likely to become locally extinct (population size = 0) if the population trend remains the same. Note that in your graph, year is on the x-axis and the population size is on the y-axis. Show your work! Round your answer to the nearest year. (1 point)
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