Mastering Biology Chapter 19 Flashcards

Questions and Answers

An ideal habitat with unlimited resources is associated with

Neither exponential growth nor logistic growth

Population crashes

Logistic growth

Both exponential growth and logistic growth

Exponential growth (correct)

The maximum population a habitat can support is its

Death rate

Carrying capacity (correct)

Exponential growth

Logistic growth

Birth rate

Logistic growth involves

Population growth reaching carrying capacity and then speeding up

Population growth slowing down as the population approaches carrying capacity (correct)

A population crash

Population size decreasing to zero

Population growth continuing forever

In exponential growth

Population size grows faster and faster as the population gets bigger Signup and view all the answers

Which of the following would NOT cause population size to decrease?

Increased birth rate Signup and view all the answers

To figure out the human population density of your community, you would need to know the number of people living there and __________.

the size of the area in which they live Signup and view all the answers

An example of population density is __________.

the number of Paramecium caudatum in a 250-milliliter solution within a glass flask Signup and view all the answers

Chimpanzees have a relatively low birth rate. They take good care of their young, and most chimps live a long life. The chimp survivorship curve would look like __________.

a relatively flat line that drops steeply at the end Signup and view all the answers

A population is defined as __________.

a group of individuals of a single species that occupies the same general area Signup and view all the answers

A set of traits that affects an organism's schedule of reproduction and survival is called its _____.

life history Signup and view all the answers

A population will always grow exponentially __________.

if there are no limiting factors Signup and view all the answers

When birth rate equals death rate, __________.

the size of a population remains constant Signup and view all the answers

A population of mice has grown so rapidly that there are 2,400 individuals in an ecosystem that will support about 1,800 mice. The mouse population is most likely to __________.

undergo a dramatic decline in size, possibly to a stable level at or below 1,800 individuals Signup and view all the answers

A newly mated queen ant establishes a nest in an unoccupied patch of suitable habitat. Assuming that no disasters strike the nest, which type of equation is likely to best describe its population growth?

logistic Signup and view all the answers

No population can grow indefinitely. The ultimate size of any population is limited by __________.

the carrying capacity of its environment Signup and view all the answers

Which one of the following would most likely be an example of an abiotic factor that limits population growth?

daily temperature extremes Signup and view all the answers

Human population growth __________.

is currently exponential Signup and view all the answers

The single greatest current cause of population decline is __________.

habitat destruction Signup and view all the answers

A non-native species that has spread far beyond the original point of introduction and causes environmental or economic damage is called a(n) _____.

invasive species Signup and view all the answers

Which of the following is a definition of the ecological footprint?

the estimate of the amount of land required to provide the raw materials an individual or a population consumes Signup and view all the answers

Study Notes

Population Growth Models

Exponential growth occurs in ideal habitats with unlimited resources.
Logistic growth describes population growth slowing as it approaches carrying capacity.

Key Definitions

Carrying Capacity: The maximum population an environment can sustain.
Population Density: The number of individuals per unit area, exemplified by organisms in a given space.

Population Dynamics

Increased birth rates can prevent population size decline.
The relationship between birth rate and death rate determines population stability.

Growth Patterns

In exponential growth, population size accelerates as resources are abundant.
The survivorship curve for chimpanzees shows a gradual decline towards the end of their lifespan.

Population Characteristics

A population consists of individuals of one species within a specific area.
Life history traits determine an organism's reproductive schedule and survival chances.

Influencing Factors on Population Growth

A population is most likely to grow exponentially if it faces no limiting factors.
The carrying capacity limits the maximum sustainable size of a population.

Environmental Impact

Abiotic factors, such as temperature extremes, can limit population growth.
Habitat destruction is the leading cause of current population declines.

Invasive Species

An invasive species causes ecosystem damage due to its spread beyond the initial introduction area.

Ecological Footprint

This measure estimates the land required to support individual or population consumption of resources.

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Description

Test your knowledge of key concepts in Chapter 19 of Mastering Biology with these flashcards. This chapter focuses on population dynamics, including exponential growth and carrying capacity. Perfect for preparing for exams and reinforcing your understanding of the material.