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A group of several members of the same species.
What is a population?
The average number of children a woman gives birth to in her lifetime.
What is the fertility rate?
The average number of years members of a population are likely to live.
What is life expectancy?
Land that can be used to farm crops.
What is arable land?
A relationship in which different individuals or populations attempt to use the same limited resource.
What is competition?
The number of individuals per unit area or volume.
What is density?
A relationship where one species benefits and the other is neither harmed nor helped.
What is commensalism?
The basic facilities and services that support a community such as public water supplies, sewer lines, power plants, roads, etc.
What is infrastructure?
A relationship between two organisms where one takes nourishment from the other over time.
What is parasitism?
A relationship between organisms where one organism feeds on the other.
What is predation?
A close relationship between to species in which each species provides a benefit to the other.
What is mutualism?
The study of populations.
What is demography?
A graph used to show the different kinds of survivorship.
What is a survivorship curve graph?
The distribution of ages in a specific population at a certain time.
What is age structure?
The population size where birth rate and death rate are equal.
What is carrying capacity?
The maximum number of offspring that each member of the population can produce.
What is reproductive potential?
The percentage of members of a group that are likely to survive to any given age.
What is survivorship?
The movement of people from rural areas to cities.
What is urbanization?
The movement of individuals from one area to another.
What is migration?
The arrangement of a population in an area.
What is dispersion?
When a population grows faster and faster over time.
What is exponential growth?
The model that describes how economic and social changes affect population growth rates.
What is demographic transition?
The range of conditions in which a species can survive.
What is a niche?
A relationship in which two species live in close association.
What is symbiosis?
The average number of children that two parents must have in order to "replace" themselves in the population.
What is replacement level?