Question 1

Exponential growth occurs when:

Accepted Answer

A) the number of births each year is constant and the birth rate is higher than the death rate. 
B) the population grows by a fixed percentage of its size each year. 
C) the rate of emigration is higher than the rate of immigration. 
D) the biotic potential decreases each year. 
E) environmental resistance declines each year. 
A) the number of births each year is constant and the birth rate is higher than the death rate. 
B) the population grows by a fixed percentage of its size each year. 
C) the rate of emigration is higher than the rate of immigration. 
D) the biotic potential decreases each year. 
E) environmental resistance declines each year.

Question 2

The sum of all factors that limit the ability of a population to grow is known as ________.

Accepted Answer

environmen

Question 3

What factors determine Earth's carrying capacity for humans?

Accepted Answer

Human carrying capacity is det

Question 4

The population shown in the graph is demonstrating:

Accepted Answer

A) a typical boom-and-bust pattern. 
B) clumped distribution. 
C) an S-curve growth pattern. 
D) exponential growth. 
E) logistic population growth. 
A) a typical boom-and-bust pattern. 
B) clumped distribution. 
C) an S-curve growth pattern. 
D) exponential growth. 
E) logistic population growth.

Question 5

A random population distribution:

Accepted Answer

A) is an advantage in avoiding predators. 
B) occurs when resources are evenly spaced. 
C) allows predators to hunt more effectively. 
D) is rare. 
E) is found only in plants. 
A) is an advantage in avoiding predators. 
B) occurs when resources are evenly spaced. 
C) allows predators to hunt more effectively. 
D) is rare. 
E) is found only in plants.

Question 6

When a new population stabilizes at the carrying capacity, it is described as logistic population growth. True or False?

Accepted Answer

A) True 
 B)False

Question 7

Environmental resistance may limit the size of populations by:

Accepted Answer

A) increasing both birth and death rates. 
B) decreasing both birth and death rates. 
C) increasing death rates and/or decreasing birth rates. 
D) decreasing death rates and/or increasing birth rates. 
E) changing the biotic potential. 
A) increasing both birth and death rates. 
B) decreasing both birth and death rates. 
C) increasing death rates and/or decreasing birth rates. 
D) decreasing death rates and/or increasing birth rates. 
E) changing the biotic potential.

Question 8

What happened to the forests of Easter Island?

Accepted Answer

A) They disappeared after humans brought herbivores to the island. 
B) They never existed; the island has always been barren. 
C) They disappeared as a result of clear-cutting by humans. 
D) They have not existed for several million years. 
E) They disappeared when humans brought a tree disease to the island. 
A) They disappeared after humans brought herbivores to the island. 
B) They never existed; the island has always been barren. 
C) They disappeared as a result of clear-cutting by humans. 
D) They have not existed for several million years. 
E) They disappeared when humans brought a tree disease to the island.

Question 9

The growth rate of a population is the difference between the birth rate and the death rate. True or False?

Accepted Answer

A) True 
 B)False

Question 10

Which factor does NOT influence the size a population reaches over time?

Accepted Answer

A) number of individuals migrating 
B) number of deaths 
C) age of females at reproduction 
D) distance traveled by migrants 
E) number of births 
A) number of individuals migrating 
B) number of deaths 
C) age of females at reproduction 
D) distance traveled by migrants 
E) number of births

Question 11

Environmental resistance is:

Accepted Answer

A) limits imposed on population growth by only the living environment (such as predators or competitors). 
B) limits imposed on population growth by only the nonliving environment. 
C) limits imposed on population growth by both the living and nonliving environments. 
D) a factor that decreases both death rates and birth rates. 
E) a factor that increases both death rates and birth rates. 
A) limits imposed on population growth by only the living environment (such as predators or competitors). 
B) limits imposed on population growth by only the nonliving environment. 
C) limits imposed on population growth by both the living and nonliving environments. 
D) a factor that decreases both death rates and birth rates. 
E) a factor that increases both death rates and birth rates.

Question 12

If a population of 100 birds increases to 120 birds in a year, what is r?

Accepted Answer

A) 0)16 
B) 0)20 
C) 1)2 
D) 2 
E) 20 
A) 0)16 
B) 0)20 
C) 1)2 
D) 2 
E) 20

Question 13

Based on its population pyramid, this population:

Accepted Answer

A) is expanding. 
B) is remaining the same. 
C) is in a boom-and-bust cycle. 
D) is showing negative growth. 
E) has reached its carrying capacity. 
A) is expanding. 
B) is remaining the same. 
C) is in a boom-and-bust cycle. 
D) is showing negative growth. 
E) has reached its carrying capacity.

Question 14

Which species has the highest biotic potential?

Accepted Answer

A) a fungus that produces thousands of reproductive spores every day 
B) a bacteria that divides only once every 3 weeks 
C) a rat that produces a litter of 6 pups every 3 months 
D) an elephant that produces a single calf every 3 years 
E) a lioness that produces 3 cubs once a year 
A) a fungus that produces thousands of reproductive spores every day 
B) a bacteria that divides only once every 3 weeks 
C) a rat that produces a litter of 6 pups every 3 months 
D) an elephant that produces a single calf every 3 years 
E) a lioness that produces 3 cubs once a year

Question 15

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

Accepted Answer

A) True 
 B)False

Question 16

All the members of a species that live in a specific geographic region form a(n)________.

Accepted Answer

The answer of All the members of a species that...

Question 17

Increased population densities and increased competition lead to increased emigration. True or False?

Accepted Answer

A) True 
 B)False

Question 18

A species with high biotic potential that is transferred to a new environment where it has little environmental resistance is called a(n)________ species.

Accepted Answer

The answer of A species with high biotic potential that...

Question 19

Many species of field mice are able to reproduce several times a year and produce litters with multiple offspring. However, an ecologist noted that the population size of mice, as measured in a California grassland, did not change from year to year. The factors that keep natural populations from increasing are collectively called:

Accepted Answer

A) nonliving factors. 
B) biotic potential. 
C) scramble competition. 
D) exponential growth. 
E) environmental resistance. 
A) nonliving factors. 
B) biotic potential. 
C) scramble competition. 
D) exponential growth. 
E) environmental resistance.

Question 20

A forest fire is a density-independent population control factor. True or False?

Accepted Answer

A) True 
 B)False

Exam 26: Population Growth and Regulation

Exponential growth occurs when:

The sum of all factors that limit the ability of a population to grow is known as ________.

What factors determine Earth's carrying capacity for humans?

The population shown in the graph is demonstrating:

A random population distribution:

When a new population stabilizes at the carrying capacity, it is described as logistic population growth. True or False?

Environmental resistance may limit the size of populations by:

What happened to the forests of Easter Island?

The growth rate of a population is the difference between the birth rate and the death rate. True or False?

Which factor does NOT influence the size a population reaches over time?

Environmental resistance is:

If a population of 100 birds increases to 120 birds in a year, what is r?

Based on its population pyramid, this population:

Which species has the highest biotic potential?

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

All the members of a species that live in a specific geographic region form a(n)________.

Increased population densities and increased competition lead to increased emigration. True or False?

A species with high biotic potential that is transferred to a new environment where it has little environmental resistance is called a(n)________ species.

A forest fire is a density-independent population control factor. True or False?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

The Continuity of Life: Cellular Reproduction

Patterns of Inheritance

Dna: the Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amidst Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Community Interactions

How Do Ecosystems Work

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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