Understanding Populations

What does a population ecologist need to know to understand population changes?

• The population's political views

• The population's density and dispersion

• The population's favorite color

• The population's income levels

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What is population ecology primarily concerned with?

• The study of individual organisms and their roles in the ecosystem

• The study of groups within a species that interact mostly with each other

• The study of human populations only

• The study of non-living components of an environment

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What are density-dependent limitations?

• Factors that limit growth based on the population's knowledge

• Factors that limit growth based on the population's size

• Factors that limit growth based on the population's age

• Factors that limit growth based on the population's gender distribution

What is carrying capacity?

• The maximum height individuals can reach in a given habitat

• The ability of the environment to carry sound

• The maximum number of individuals that can leave an area

• The maximum number of individuals that can be supported by the available resources

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What type of growth do populations experience when not limited?

• Linear growth

• Exponential growth

• Declining growth

• Static growth

What can cause a population to stop growing exponentially?

• Reaching the carrying capacity

• Introduction of a new species

• Unlimited resources

• A sudden increase in birth rates

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What is a density-independent limitation?

• A limitation that affects only the oldest individuals

• A limitation that depends on the population's density

• A limitation that affects the population regardless of its density

• A limitation that only occurs in dense urban areas

Why is understanding population ecology useful?

• It helps in planning space missions

• It helps in solving problems like disease outbreaks

• It is only useful for scientists

• It helps predict fashion trends

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What factor contributed to the mosquito population explosion in Dallas in 2012?

• An exceptionally cold winter

• A decrease in the number of bats

• An exceptionally hot summer

• Increased use of insect repellent

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Which of the following are density dependent factors?

• competition for resources

• predation

• disease

• natural disasters

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