PopulationsIB Biology

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Questions to help direct your individual notes for this topic

1. Outline how population size is affected by:-natality-immigration-mortality-emigration

2. Draw and label a graph showing a sigmoid (s-shaped) population growth curve

3. Explain the reasons for:-the exponential growth phase-the plateau phase-the transitional phase between these two phases

4. List three factors that set limits to population increase

Graph 1: Rabbits Over Timea. The graph shows a __________ growth curve.b. The carrying capacity for rabbits is ______c. During which period of time were the rabbits in exponential growth?

Graph 2: Average Toe Lengtha. In 1800, about how many people surveyed had a 3 cm toe? _______b. How many in 2000? _______c. In 2000, what is the mode toe length? ______ d. What is the median toe length in 1800 _______

Graph 3: Mexico and USa) In Mexico, what percentage of the population is between 0-4 years

of age? _______ b) In the US? ______

c) Which population is growing the fastest? ________

d) Which age group has the smallest number in both countries? _____