Chapter 2 Savvas Review

The primary factors affecting population growth include birthrate, death rate, immigration, and ________.

• density

• geographic range

• emigration

• demography

Which factor would reduce the likelihood of exponential growth occurring in a given population?

• lower death rates

• higher birthrates

• less competition

• reduced resources

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The graph shows a model of the growth of a bacterial population. Which of the following correctly describes the growth curve?

• demographic

• logistic

• limiting

• exponential

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What defines the carrying capacity of a particular species?

• Birthrate

• Death rate

• Immigration

• Resources

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How does a population's growth rate change as it goes through the phases of logistic growth?

• Increases

• Decreases

• Remains constant

• Fluctuates

What is happening to the growth of a population in which death rate equals birthrate, but emigration is greater than immigration?

• Exponential growth

• Logistic growth

• No growth

• Decline

What is population density?

• The number of organisms in a population

• The geographic range of a population

• The rate of immigration in a population

• The number of individuals per unit area

What type of population distribution pattern is exhibited by a flock of birds that nest close together? Why do they likely show this pattern?

• Random distribution; for protection

• Uniform distribution; for resource competition

• Clumped distribution; for mating opportunities

• Normal distribution; for optimal survival

Which would be least likely to be affected by a density-dependent limiting factor?

• A small population of tigers scattered across a wide area

• A rapidly reproducing population of bacteria

• A large, dense population of fish in a pond

• A population of birds with a high immigration rate

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Which of the following is a density-independent limiting factor?

• A struggle for food, water, space, or sunlight

• Predator/prey relationships

• Flood damage from a hurricane

• Parasitism and disease