Question 1

Which of the following would be a characteristic of a K-selected species?

Accepted Answer

A) Most K-selected species live until older age. 
B) All K-selected species live very long life spans. 
C) Individuals tend to die at all ages in the life span. 
D) Most die at relatively young ages. 
A) Most K-selected species live until older age. 
B) All K-selected species live very long life spans. 
C) Individuals tend to die at all ages in the life span. 
D) Most die at relatively young ages. A

Question 2

Ecologists often say that one individual living in a developed country cannot be counted as ecologically equal to one individual from a developing country because:

Accepted Answer

A) the fertility rates are the same. 
B) the use of natural resources per person is different. 
C) r is different. 
D) K is different. 
A) the fertility rates are the same. 
B) the use of natural resources per person is different. 
C) r is different. 
D) K is different. B

Question 3

Species that are introduced to new habitats,such as islands,often exhibit very high growth rates,but then growth rates level off.Explain this phenomenon,and describe the different patterns of growth.

Accepted Answer

Growth is exponential while the species exploits a new niche; growth levels off (or sometimes crashes)when resources become limiting.

Question 4

A population's intrinsic rate of increase can be calculated by:

Accepted Answer

A) subtracting r from K. 
B) multiplying r by K. 
C) multiplying r by the initial population size, N. 
D) subtracting birth rate from death rate. 
A) subtracting r from K. 
B) multiplying r by K. 
C) multiplying r by the initial population size, N. 
D) subtracting birth rate from death rate.

Question 5

Humans would be typical of which survivorship curve category?

Accepted Answer

A) early-loss species 
B) constant-loss species 
C) late-loss species 
D) late-gain species 
E) early-gain species 
A) early-loss species 
B) constant-loss species 
C) late-loss species 
D) late-gain species 
E) early-gain species

Question 6

Which of the following is true of a population's intrinsic rate of increase?

Accepted Answer

A) It is the rate at which a population would grow if there were no external limits to growth. 
B) It is the death rate minus the birth rate, or a measure of annual population change in a population near K. 
C) It is the rate at which populations grow in nature in the face of all environmental limits. 
D) It occurs when the birth rate equals the death rate. 
A) It is the rate at which a population would grow if there were no external limits to growth. 
B) It is the death rate minus the birth rate, or a measure of annual population change in a population near K. 
C) It is the rate at which populations grow in nature in the face of all environmental limits. 
D) It occurs when the birth rate equals the death rate.

Question 7

An "S" shaped curve would be indicative of ________ growth.

Accepted Answer

The answer of An "S" shaped curve would be indicative...

Question 8

A community of organisms and the physical environment with which they interact is an ecosystem.

Accepted Answer

A) True 
 B)False

Question 9

Most r-selected species are small and short lived.

Accepted Answer

A) True 
 B)False

Question 10

A population that grows by an unvarying number of new units added to the population per unit of time is undergoing exponential growth.

Accepted Answer

A) True 
 B)False

Question 11

The carrying capacity of an environment can cause a population initially growing very quickly to level off,resulting in an S-shaped curve.

Accepted Answer

A) True 
 B)False

Question 12

What factors may affect the carrying capacity for a species in an environment? Is the carrying capacity usually a fixed number,and why or why not?

Accepted Answer

All resources required by an organism,in

Question 13

Studying the amount of carbon stored in the forest floor per hectare in a boreal forest in Canada after a fire would be an example of studying ecology at which level?

Accepted Answer

A) biosphere 
B) ecosystem 
C) community 
D) population 
A) biosphere 
B) ecosystem 
C) community 
D) population

Question 14

Which of the following species would be classified as an opportunistic species?

Accepted Answer

A) humans 
B) houseflies 
C) chimpanzees 
D) kangaroos 
A) humans 
B) houseflies 
C) chimpanzees 
D) kangaroos

Question 15

Which is true of predictions about the expected population of the United States in the year 2050?

Accepted Answer

A) The U.S. population will exceed 1.5 billion. 
B) Immigration is not expected to have a large effect on the U.S. population. 
C) The population is expected to grow about 43 percent. 
D) Emigration is expected to have a large effect on the U.S. population. 
A) The U.S. population will exceed 1.5 billion. 
B) Immigration is not expected to have a large effect on the U.S. population. 
C) The population is expected to grow about 43 percent. 
D) Emigration is expected to have a large effect on the U.S. population.

Question 16

Refer to the figure below, and then answer the question that follows.
  
-Which graph,A,B,or C,represents a population likely to exhibit the greatest population rate increase over the next few decades?

Accepted Answer

The answer of Refer to the figure below, and then...

Question 17

Species with individuals that die equally or linearly at all different ages throughout their life span are known as ________-loss species.

Accepted Answer

The answer of Species with individuals that die equally or...

Question 18

Which of the following would be generally true of r-selected species?

Accepted Answer

A) Most live until older age. 
B) All live very short life spans. 
C) R-selected species are larger organisms that produce few offspring. 
D) R-selected species are smaller organisms that produce many offspring. 
A) Most live until older age. 
B) All live very short life spans. 
C) R-selected species are larger organisms that produce few offspring. 
D) R-selected species are smaller organisms that produce many offspring.

Question 19

Which of the following would be a valid,general pattern seen in generation time?

Accepted Answer

A) Nearly all K-selected organisms have short generation times. 
B) Species with the fastest growth rates have the longest generation times. 
C) The larger the species is, the longer its generation time tends to be. 
D) All vertebrates have long generation times. 
A) Nearly all K-selected organisms have short generation times. 
B) Species with the fastest growth rates have the longest generation times. 
C) The larger the species is, the longer its generation time tends to be. 
D) All vertebrates have long generation times.

Question 20

Most K-selected species have short generation times.

Accepted Answer

A) True 
 B)False

Exam 34: An Interactive Living World 1: Populations in Ecology

Which of the following would be a characteristic of a K-selected species?

Ecologists often say that one individual living in a developed country cannot be counted as ecologically equal to one individual from a developing country because:

Species that are introduced to new habitats,such as islands,often exhibit very high growth rates,but then growth rates level off.Explain this phenomenon,and describe the different patterns of growth.

A population's intrinsic rate of increase can be calculated by:

Humans would be typical of which survivorship curve category?

Which of the following is true of a population's intrinsic rate of increase?

An "S" shaped curve would be indicative of ________ growth.

A community of organisms and the physical environment with which they interact is an ecosystem.

Most r-selected species are small and short lived.

A population that grows by an unvarying number of new units added to the population per unit of time is undergoing exponential growth.

The carrying capacity of an environment can cause a population initially growing very quickly to level off,resulting in an S-shaped curve.

What factors may affect the carrying capacity for a species in an environment? Is the carrying capacity usually a fixed number,and why or why not?

Studying the amount of carbon stored in the forest floor per hectare in a boreal forest in Canada after a fire would be an example of studying ecology at which level?

Which of the following species would be classified as an opportunistic species?

Which is true of predictions about the expected population of the United States in the year 2050?

Refer to the figure below, and then answer the question that follows. -Which graph,A,B,or C,represents a population likely to exhibit the greatest population rate increase over the next few decades?

Species with individuals that die equally or linearly at all different ages throughout their life span are known as ________-loss species.

Which of the following would be generally true of r-selected species?

Which of the following would be a valid,general pattern seen in generation time?

Most K-selected species have short generation times.

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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