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Biology chapter 5 test
Terms in this set (30)
What does the range of a population tell you that density does not?
the areas inhabited by a population
Which would be least likely to be affected by a density-dependent limiting factor?
a small, scattered population
As resources in a population become less available, population growth
reaches carrying capacity
What can cause a population to grow
The birthrate becomes higher than the death rate
Demographic transition is change from high birth rates and high death rates to
low birth rates and low death rates
About 500 years ago, the world's population started
growing more rapidly
Which are two ways a population can decrease in size?
decreased birthrate and emigration
If a population grows larger than the carrying capacity of the environment, the
death rate may rise
In countries like India, the human population is growing
Which density-dependent factors other than the predator/prey relationship affected the populations of moose and wolves on Isle Royale?
food availability for the moose and disease for the wolf
Which of the following is not likely to be a limiting factor on the sea otter population?
Which will reduce competition within a species' population?
In Rwanda, there are more young children than teenagers, and more teenagers than adults. This age structure indicates a population that
will double in 30 years
When individuals in a population reproduce at a constant rate, it produced a growth pattern called
There are 150 saguaro cacti plants per square kilometer in a certain area of Arizona desert. To which population characteristics does this information refer?
When an individual moves into a population from a different population, it is called
Under conditions of logistic growth, population size will rise and fall around an average point called a(an)
zero population growth is a characteristic of ______ growth
resource shortages triggered by increasing population size are density _______ limiting factors
Social and _______ factors explain why some countries have high growth rates while other countries grow slowly or not at all.
How does population growth in the United States compared with that of China and India?
Population growth has slowed in the United States, but China and India are only in the beginning stage of demographic transition where the population is still growing rapidly
How can a demographer, or scientist who studies demography, predict how a population will change in the future?
A demographer studies the social and economic factors that affect a population and the age structure in order to predict how it will change
How does emigration affect population size?
Emigration is the movement of individuals out of a population and reduces its size if all other factors are equal
When is a density-independent limiting factor? Give two examples
A density-dependent limiting factor is a limiting factor that affects all populations regardless of size, such as a rainstorm, drought, fire and certain human activities
what kept the human population growth rate low before the industrial revolution
Limiting factors, such as food scarcity and diseases, kept the human population growth rate low
Discuss four ways population size can change
Sequence the historical events that contributed to the current human population growth
Differentiate between density-dependent and density-independent limiting factors
Differentiate between exponential and logistic growth
Explain the limiting factors that control population growth
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