Terms in this set (39)
In which demographic model is population growth the fastest?
Which of the following statements most accurately describes a comparison of demographic indicators between the United States, Brazil
The United States and Brazil are higher in life expectancy than Nigeria.
Which countries are in the postindustrial phase of demographic transition?
Japan and some countries in Europe
A group of individuals of the same species occupying a given area defines a(n)
A comparison of migratory and non-migratory Canada goose populations demonstrates that
non-migratory populations have more energy to devote to reproduction, and so they tend to increase faster.
The total number of individuals of the same species that occupy a given area at a given time is the
The average number of individuals of the same species per unit of surface area at a given time is the
The distribution of the human population in the United States is
Measuring the population size in several quadrants and then using that data to estimate total population size is a good method for which
of the following?
barnacles and creosote bushes
Capture-recapture is a good way to estimate the population size of
butterflies, cardinals, and field mice.
At time one, 50 butterflies were captured and were marked with paint. Two days later 100 were captured and 10 had been previously marked. What is the estimated population size?
The maximum rate of increase of a population is its
The growth rate of a population per unit of time is calculated by using this formula: G = r x N. What is the quantity "r" and how is it calculated?
r is the per capita growth rate and is calculated by subtracting the number of deaths from the number of births
Zero population growth is achieved when
the population size has been stabilized for a long time.
A situation in which the birth rate equals the death rate is called
zero population growth.
The rate of increase for a population (r) refers to what kind of relationship between birth rate and death rate?
the difference between them
Which characteristic of a population is a convenient way to express the rate of change within a population?
A population that is growing exponentially in the absence of limiting factors can be illustrated by which curve?
Which concept is a way to express the growth rate of a given population?
are limited by the carrying capacity.
A change in a population that is not related strictly to the size of the population is best described as
In itself, a flood that washes away an entire population of rabbits is
Which density-dependent factor controls the size of a population?
Density-independent controls over population growth include
The earthquake that devastated the population of Haiti in January 2010 could be described as a_______________ factor, while water and
food shortages that caused disease and death in the aftermath among quake survivors could be described as ______________factors.
density independent, density dependent
A cohort is
a group of individuals of the same species born during the same time interval.
Type II survivorship curves
typify a population in which all ages have an equal chance of surviving.
In Atlantic codfish, pressure on the population by commercial fishing caused
the size at sexual maturity to decrease and the age of sexual maturity to decrease.
The earliest human populations were found in
dry woodlands and savanna.
The momentum of human population increase, or the length of time it takes to slow human population growth, is influenced most by
the percentage of humans in the pre-reproductive age groups.
The age structure diagram for rapidly growing populations
is in the form of a pyramid and has a very broad base showing a large number of young.
Which is not a density-dependent, growth-limiting factor?
What distribution pattern is the most common in the natural world?
A J-shaped growth curve is converted to an S-shaped one
when the carrying capacity is reached.
The carrying capacity of an environment is determined by
the sustainable supply of resources it provides.
A type III survivorship curve is characteristic of
Organisms that demonstrate a type I survivorship curve are characterized by
low reproductive rate, large offspring.
Four of the five answers listed below follow a type II survivorship curve. Select the exception.
large mammals with extended parental care
A type III survivorship curve (mortality high at birth and decreasing with age) is characteristic of all but which species?