Part I
Yeast Data Table
1. Open the yeast data table.
2. Graph the information found on the chart.
3. Is the graph an exponential growth curve or a
Logistic Growth curve? Using data from your table
explain your thinking.
4. Highlight the various areas of your yeast graph,
like the one found on page 1034. Explain what is
happening in each stage of your graph. Use the
terms birth rate and death rate. Is your
population still growing at this stage? Why or why
not.
5. Explain what is meant by steady state. What would
happen if you have an increase in your yeast
population in the steady state? What happens if
the death rate increases?
6. Make a dashed horizontal line through the middle
of the steady state using a ruler. What is the
holding capacity for this population of yeast?
7. Explain what is the difference between Exponential
and Logistic growth curves.
8. Which growth curve do you find in a natural
environment?
9. What is a population?
10.
Give three examples of natural populations
found around DuBois.
Part 2
Human population: Log onto the laptops and answer the
following questions about the human population.
1. In figure 1, What age is shown for the beginning
population on the graph? How many years ago?
2. In figure 1, what age did the human population
enter exponential growth?
3. What phase of the Logistic Growth curve are we in?
4. What do you think will happen to the human
population in the future if growth continues as
shown on the graph. Think about what you learned
in the Yeast example above.
5. In figure 2, what countries are having the highest
fertility rates? What does fertility mean?
6. What countries have the lowest fertility rates?
7. What is the fertility rate for the United States?
8. In figure 3, what is a general description of what
you see in the graph?
9. In figure 7, where would one find the projected
greatest increase in the human population?
10.
What is the estimated carrying capacity of the
biosphere for humans?
http://www.globalchange.umich.edu/globalchange2/current
/lectures/human_pop/human_pop.html