Unit 4: Populations

The movement of organisms into a range is called

• immigration.

• emigration.

• population shift.

• carrying capacity.

Something that controls the growth or size of a population is

• a growth factor.

• a limiting factor.

• the carrying capacity.

• the growth rate.

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Demography is the scientific study of

• parasitism and disease.

• human populations.

• modernized countries.

• none of the above.

The pattern of spacing between individuals across the range of a population is its

• distribution.

• growth rate.

• density.

• habitat.

About 500 years ago, the world's population started

• decreasing.

• growing more rapidly.

• to reach carrying capacity.

• to level off.

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The human population experienced exponential growth just after

• plowing and irrigation began.

• the bubonic plague began.

• agriculture began.

• the Industrial Revolution began.

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Which of the following could describe a population that is decreasing in size?

• The birthrate and the death rate remain the same.

• The death rate is becoming lower than the birthrate.

• The death rate is constant and the birthrate is increasing.

• The death rate is becoming higher than the birthrate?

In a logistic growth curve, exponential growth is the phase in which the population

• grows quickly.

• reaches carrying capacity.

• growth begins to slow down.

• growth stops.

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If a population grows larger than the carrying capacity of the environment, which of these is most likely to happen?

• The death rate may rise.

• The birthrate may rise.

• The death rate must fall.

• The birthrate must fall.

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Demographic transition is change from high birthrates and high death rates to

• low birthrates and low death rates.

• exponential growth.

• low birthrates and high death rates.

• indefinite growth.