Question 1

A(n)________ curve plots the probability at birth of surviving to any given age (lx)against time or age class (x).

Accepted Answer

survivorship

Question 2

The leading cause of current species extinctions is

Accepted Answer

A) global warming. 
B) habitat destruction. 
C) hunting. 
D) diseases. 
A) global warming. 
B) habitat destruction. 
C) hunting. 
D) diseases. B

Question 3

A systematic compilation of mortality and survival data for a population is called a(n)

Accepted Answer

A) age pyramid. 
B) life table. 
C) cohort group. 
D) probability summary. 
A) age pyramid. 
B) life table. 
C) cohort group. 
D) probability summary. B

Question 4

Population ________ refers to the rate at which the number of individuals in a population increases or decreases with time.

Accepted Answer

The answer of Population ________ refers to the rate at...

Question 5

The net reproductive rate is the sum of what column?

Accepted Answer

A) lxbx 
B) bx 
C) lx 
D) x 
A) lxbx 
B) bx 
C) lx 
D) x

Question 6

What is one of the most damaging issues in freshwater systems that has caused the highest number of declines in fish?

Accepted Answer

A) pollution 
B) dams 
C) climate change 
D) ozone depletion 
A) pollution 
B) dams 
C) climate change 
D) ozone depletion

Question 7

________ is the study of populations.

Accepted Answer

The answer of ________ is the study of populations....

Question 8

Exponential growth is characteristic of populations that inhabit favorable environments at low densities.

Accepted Answer

A) True 
 B)False

Question 9

Most life tables have been constructed for

Accepted Answer

A) short-lived plants. 
B) insects. 
C) short-lived vertebrates. 
D) long-lived mammals. 
A) short-lived plants. 
B) insects. 
C) short-lived vertebrates. 
D) long-lived mammals.

Question 10

Why are population projection matrices so complicated?

Accepted Answer

A) because plant sizes are fixed over time 
B) because larger populations require more sophistication 
C) because fecundity is high in some species 
D) because some species can move back and forth between life stages 
A) because plant sizes are fixed over time 
B) because larger populations require more sophistication 
C) because fecundity is high in some species 
D) because some species can move back and forth between life stages

Question 11

According to the latest data,which region has the highest number of species recently gone extinct?

Accepted Answer

A) North America 
B) South America 
C) Africa 
D) Australia 
A) North America 
B) South America 
C) Africa 
D) Australia

Question 12

The gross reproductive rate is

Accepted Answer

A) the total number of offspring born to a population. 
B) the total number of offspring born to a population each year. 
C) the average number of female offspring born in a year. 
D) the average number of female offspring born to her over her lifetime. 
A) the total number of offspring born to a population. 
B) the total number of offspring born to a population each year. 
C) the average number of female offspring born in a year. 
D) the average number of female offspring born to her over her lifetime.

Question 13

________ stochasticity is the random variation in birth and death rates that occurs in populations from year to year as a result of natural disasters and other annual variations in the environment.

Accepted Answer

The answer of ________ stochasticity is the random variation in...

Question 14

Immigration and emigration occur within a closed population.

Accepted Answer

A) True 
 B)False

Question 15

The average number of female offspring born to a female over her lifetime is referred to as the

Accepted Answer

A) crude birthrate. 
B) age-specific birthrate. 
C) gross reproductive rate. 
D) net reproductive rate. 
A) crude birthrate. 
B) age-specific birthrate. 
C) gross reproductive rate. 
D) net reproductive rate.

Question 16

Given λ = 2,what would the intrinsic rate of reproduction (r)be?

Accepted Answer

A) 4 
B) 0)69 
C) 1 
D) 0 
A) 4 
B) 0)69 
C) 1 
D) 0

Question 17

Age-specific mortality is defined as the

Accepted Answer

A) difference between the number of individuals alive for any age class and the next older age class. 
B) number of individuals that died during any given time interval divided by the number alive at the beginning of that interval. 
C) number of individuals from the original cohort who are alive at the specified age. 
D) probability at birth of surviving to any given age. 
A) difference between the number of individuals alive for any age class and the next older age class. 
B) number of individuals that died during any given time interval divided by the number alive at the beginning of that interval. 
C) number of individuals from the original cohort who are alive at the specified age. 
D) probability at birth of surviving to any given age.

Question 18

A time-specific life table is constructed by sampling the

Accepted Answer

A) fate of a group of individuals born at a given time from birth to death. 
B) fate of a group of individuals born over several time periods from birth to death. 
C) population to obtain a distribution of age classes during a single time period. 
D) population to obtain a distribution of age classes during multiple time periods. 
A) fate of a group of individuals born at a given time from birth to death. 
B) fate of a group of individuals born over several time periods from birth to death. 
C) population to obtain a distribution of age classes during a single time period. 
D) population to obtain a distribution of age classes during multiple time periods.

Question 19

A(n)________ distribution refers to the proportion of individuals in the various age classes for any one year.

Accepted Answer

The answer of A(n)________ distribution refers to the proportion of...

Question 20

A group of individuals born in the same period of time is called a(n)________.

Accepted Answer

The answer of A group of individuals born in the...

Exam 9: Population Growth

A(n)________ curve plots the probability at birth of surviving to any given age (lx)against time or age class (x).

The leading cause of current species extinctions is

A systematic compilation of mortality and survival data for a population is called a(n)

Population ________ refers to the rate at which the number of individuals in a population increases or decreases with time.

The net reproductive rate is the sum of what column?

What is one of the most damaging issues in freshwater systems that has caused the highest number of declines in fish?

________ is the study of populations.

Exponential growth is characteristic of populations that inhabit favorable environments at low densities.

Most life tables have been constructed for

Why are population projection matrices so complicated?

According to the latest data,which region has the highest number of species recently gone extinct?

The gross reproductive rate is

________ stochasticity is the random variation in birth and death rates that occurs in populations from year to year as a result of natural disasters and other annual variations in the environment.

Immigration and emigration occur within a closed population.

The average number of female offspring born to a female over her lifetime is referred to as the

Given λ = 2,what would the intrinsic rate of reproduction (r)be?

Age-specific mortality is defined as the

A time-specific life table is constructed by sampling the

A(n)________ distribution refers to the proportion of individuals in the various age classes for any one year.

A group of individuals born in the same period of time is called a(n)________.

The Nature of Ecology

Climate

The Aquatic Environment

The Terrestrial Environment

Adaptation and Natural Selection

Plant Adaptations to the Environment

Animal Adaptations to the Environment

Properties of Populations

Life History

Intraspecific Population Regulation

Species Interactions, population Dynamics, and Natural Selection

Interspecific Competition

Predation

Parasitism and Mutualism

Community Structure

Factors Influencing the Structure of Communities

Community Dynamics

Landscape Dynamics

Ecosystem Energetics

Decomposition and Nutrient Cycling

Biogeochemical Cycles

Terrestrial Ecosystems

Aquatic Ecosystems

Coastal and Wetland Ecosystems

Large-Scale Patterns of Biological Diversity

The Ecology of Climate Change

Filters