Chapter 5 Biology- Populations -Class Presentation Questions

(This test will be APPLICATION oriented!)

CH 5-1 How Populations Grow

  1. Describe the relationship that exists between the sea otters, kelp, sea urchins, & killer whales.
  2. List & describe the four main characteristics of a population.
  3. ______=the # of individuals per unit area. Give an “application example” of this definition.
  4. ______refers to how many not ______!!
  5. If the death rate of a population is greater than the birthrate, the population ______.
  6. A growing population will have a high ______rate & a low ______rate. So, when the ______rate is greater than the ______, the population shrinks.
  7. ______-the movement of organisms INTO a given area from another area.
  8. ______-the movement of organisms OUT of the population.
  9. ______-when individuals in a population reproduce at a constant rate. Draw the graph/curve that illustrates this definition description. What shape is represented?
  10. When will a population grow exponentially? (under what conditions?)
  11. ______-the various growth phases through which most of the populations go…showing the growth rate slowing or stopping following a period of exponential growth. ***Draw a graph/curve that illustrates this definition. ***What shape is represented?
  12. ______-the largest # of individuals of a population that a given environment can support. A horizontal line is drawn THROUGH the part of the graph where population growth has leveled off…to indicate this on a logistic growth curve.
  13. In a logistic growth curve, exponential growth is the phase in which the population grows ______.
  14. If a population grows larger than the carrying capacity of the environment the death rate may ______.

15. Under ideal conditions with unlimited resources, a population will grow ______.

5-2 Limits to Growth

1. ______-a biotic or abiotic factor/resource in the environment that causes a population to decrease.

2. List & describe the TWO types of limiting factors. ALSO list 4 examples of each limiting factor!!

3. ______-occurs when populations become crowded…the organisms struggle with one another for food, water, space, sunlight, or other essentials of life.

4. ______-mechanism for population control in which a population is regulated by predation.

5. How are parasites similar to predators?

6. ______factors tend to be abiotic. They affect ALL populations the same way regardless of size.

7. What will reduce competition within a species population?

5-3 Human Population Growth

1. Define demography.

2. ______the change from high birth rates & high death rates to a low birth rate and a low death rate.

3. Countries in the FIRST state/phase of demographic transition have a ______-death rate & a ______birth rate.

4. When is demographic transition complete?

5. Future growth can be predicted using what type of model?

6. What overall pattern do you see in the structure of Rowanda’s population in the age structure diagrams on page 131 figure 5-13?

7. Using the same figure on page 131, How do the United States & Rowanda differ in the percentages of 10-14 year olds in the population?

8. If you compare the top halves of the two graphs, what can you tell about Rowanda’s population?