Population Dynamics Limiting Factors Density Problems Human Population Actual Test Questions

The number of organisms per unit area.

Population Density

The pattern of spacing of a population within an area.

Dispersion

The type of dispersion displayed by a herd animal such as American Bison.

Clumped

The type of growth model in which growth begins slow and then increases faster and faster. Shown by a J-Shaped Graph.

Exponential

The type of growth model in which the population grows slowly at first, followed by a period of rapid growth, and then the stabilizes at the carrying capacity. Shown with an S- Shaped Graph.

Logistic

Any factor in the environment that depends on the number of members in a population per unit area. (Disease, Competition, Parasites)

Density Dependent

Any factor in the environment that does NOT depend on the number of members per unit area. (Weather, Human Influence)

Density Independent

The type of reproductive strategists that produces few offspring and invests a lot of resources into each offspring. (Humans, Elephants)

K-strategist

The type of reproductive strategists that produce many offspring expending little energy to each. (Fruit Flies, Mosquitoes)

R-strategist

The maximum number of individuals in a species that an environment can support for the long term.

Carrying Capacity

The number of organisms moving IN to a population.

Immigration

The number of organisms moving OUT of a population.

Emigration

A term that explains how fast a given population grows.

Population Growth Rate

The number of organisms being born into a population.

Natality

A population of bees starts at 100. If the growth rate is an increase of 50 bees/year, how many bees will there be in the population after 5 years?

350 bees

The study of human population, density, distribution, movement, and birth and death rates.

Demography

The number of males and females in each of three age groups: pre- reproductive stage, reproductive stage, and post-reproductive stage.

Age Structure

A population trend in which birth rates equal death rates.

Zero Population Growth

The largest factor causing an increase in the population of the united states.

Immigration

A change in a population from high birth and death rates to low birth and death rates.

Demographic Transition

The size of a population will decrease if mortality _________.

Increases

Density, distribution, and growth rate are characteristics used to classify which one of the following? A. Biomes B. Populations C. Limiting Factors D. Age Structure

B. Populations

A flowering plant has seeds that are carried by the wind. Infer the most likely dispersion pattern of the plants that grow from these seeds. A. Uniform B. Clumped Groups C. Random D. Spatial

C. Random

The human population growth rate has always increased. (True or False)

False

A fruit fly that has a short life span and produces many offspring can be classified into which reproductive strategy? A. r-strategist B. k-strategist C. a carrying-capacity strategist D. a logistic strategist

A. r-strategist