Exam 27: Population Growth and Regulation

In the eighteenth and nineteenth centuries, people increased Earth's capacity to support more humans through advances.

A population size will remain stable if

Developing countries tend to have a(n) age structure diagram.

Schools of fish typically exhibit a distribution pattern.

A forest fire is a density- independent population control factor.

The population shown in the pyramid is

A measure of the ability of a population to grow under ideal circumstances (maximum birth rate and minimum death rate) is its .

What term describes the maximum population size that the environment can support indefinitely?

Floods and fires are examples of , which can dramatically and unpredictably reduce populations.

A species that is transferred to a new environment where it has little environmental resistance and experiences an explosive population growth is called a(n) species.

When mosquitoes are abundant, purple martins flock to the area and feed exclusively on them. When mosquito populations are not large, purple martins are similarly scarce and feed on other insects. This is an example of

When resources are limited but spread evenly throughout a region, plants are likely to form a uniform distribution pattern.

Human populations have continued to grow because humans have increased Earth's through agriculture, medicine, and technology.

The different species within an ecosystem that interact in various ways make up a(n)

If the individuals of a species are likely to live until old age, that species exhibits a(n) survivorship curve.

Based on the data in the table, this population has a growth pattern.

The growth rate of a population is the difference between the population size and the death rate.

An ecologist is studying the painted turtle population in a small pond. At the beginning of the year, there are 100 individuals. Over the course of a year, 40 turtles are born and 60 die. There is no migration. What is the birth rate per year for this population?

Humans are classified as a late- loss population.

In the United States today, there is a trend toward women having their first child in their late 30s or early 40s. In contrast, a few decades ago, most women started having children in their early 20s. What effect would you expect this change to have on population growth in the United States? Would it have any effect if the number of children per woman remains the same? Explain.