Populations Ch. 19

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A random distribution of individuals in a population would be most likely to result from

The dispersal of seeds by wind

Population

A group o organisms that belong to the same species and live in a particular place at the same time

A population is likely to grow most rapidly if it has

A high percentage of young individuals

Logistic model

A population growth model in which exponential growth is limited by the carrying capacity

Which of the following is not a threat to survival of small populations? A) breeding in captivity B) inbreeding C) habitat destruction D) disease out breaks

A) breeding in captivity

Death rate

Also know as morality rate and number of deaths in a time period

Limiting factors

Any factor, such as space that restrains the growth of a population

The current population growth rates of developed countries

Are lower than those of developing countries

Density dependent factors

As populations grow, the limited resources get used up and affects the whole group that has same issues in their own areas

The country may have a negative growth rate if it's

Death rate is higher than its birth rate

Density independent factors

Factors such as natural disasters that reduce a population by the same portion regardless of population size and affect only thee population in the given are that experiences change

Although the United States has a larger total population than Japan, population density is greater in japan because

Geographical area is greater in the us

Birth rate - death rate =

Growth rate

The hunter-gather lifestyle is associated with

High morality rates among infants and young children

Life expectancy

How long on average an individual is expected to live

Hunter gatherer lifestyle

Hunting animals and gathering roots

The global growth rate of the human population is

Increasing but at a slower rate than in the mid-1960s

Immigration

Is the movement of individuals into a population

Emigration

Is the movement of individuals out of a population

In a population with type 1 survivorship curve, the likelihood of dying is

Low until late in life, when it increases rapidly

Demographic model

Model shows population changes

Population density

Number of individuals that live in a given area

The exponential model of population growth

Reflects the fact that the birth rate decrease as population grows

One example of a density dependent limiting factor is a

Shortage of nesting sites

Survivorship curve

The 3 different curves to morality data of different species

About 10000 to 120000 years ago, the human population began to grow more rapidly due to

The agricultural revolution

Birth rate

The number of births occurring in a time period

Population size

The number of individuals in a population

Carrying capacity

The population that an environment can sustain with the right amount of resources

Dispersion

The way I individuals of the population a e arranged in space

Agricultural revolution

When humans began to domesticate animals

Exponential model

When the rate of population growth stays the same and population size is plotted against time on a graph and cure resembles a j shaped curve

One can estimate a population's size by counting individuals in a sample of the population if the

distributuon of individuals in the sample is the same as that in the population


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