Chapter 16: Reading Guide               Name _____________________________

1. The Individuals of a Species Live in  ___________________________________

Define population:  ___________________________________________________

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2.  What limits the growth of a population?  ___________________________________

3.  What is demography?  ________________________________________________

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4. List the three key features of populations.

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5.  What problems does inbreeding cause?

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6.  Why are cheetahs in danger?  _________________________________________

7.  Define population density: ______________________________________________

8.  Illustrate the three main patterns of dispersion below:

9.  Scientists Use Models to Explain ______________________________________

10.  How often is the US census taken?  __________________

11. When more individuals are born than die, what happens? _____________________

12.  A J shaped population curve is called an __________________________________

13.  Label the Growth curve (figure 2)

14.   Define Carrying Capacity

15. What is a density-dependent factor?
Give an example

16.  When the birth rate equals the death rate, what happens to the population?

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17.  Using the population growth model (figure 16-6) calculate the rate of growth for each of the following scenarios.

 Population Birth Rate Death Rate Rate of growth (r) Mudpuppies 60/year 80/year Grasshoppers 15000/month 10,000/month Cats 550/year 50/year Crows 300/year 310/year

Which population is most likely to become extinct?  _______________________

Which population is the most stable?  ________________________

Which population is growing the fastest? __________________________

18.  Real Populations Exhibit a Range of  ____________________________

19.  Give an example of a density-independent factor:  __________________________

20.  Answer true or false to the following statements regarding R and K strategists.

_____ r-strategists have long lifspans.

_____ r-strategists have many offspring.

_____ r-strategists grow exponentially when environmental conditions are good.

_____ k-strategists have many offspring.

_____ k-strategists provide intensive care for their young.

_____ k-strategists have short life spans.

21.  Give an example of a k-strategist __________________________

Give an example of an r-strategist  _________________________

22.  Complete the table below by indicating whether the animal is an R or K strategist based on the other information.

 Animal Lifespan Number of offspring Strategy (r or k) Mayfly 3 days 100-200 Dog 11-15 yrs 4-10 per litter Human 65-90 yrs 2-4

23.  Health Watch:  Population Pyramids.    What is a population pyramid?

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24.  In 1998, which age group had more females than males?  _________________

25.  Why will the need for geriatric (old-age) care increase in the years to come?

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