Question 1

What is the significance of constructing a life table to an ecologist? What information is required to develop a life table and what is this information used for?

Accepted Answer

Constructing a life table is significant

Question 2

Because birth and death rates are not constant, tables and models developed by a demographer may have limited relevance to real populations.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following equations is used to calculate generation time?

Accepted Answer

A) N(t)= b - d 
B) Tc = ∑xlₓbₓ/∑lₓbₓ 
C) N(t)= N(0)eʳᵗ 
D) dN/dt = rN 
A) N(t)= b - d 
B) Tc = ∑xlₓbₓ/∑lₓbₓ 
C) N(t)= N(0)eʳᵗ 
D) dN/dt = rN

Question 4

In a given life table, x represents the age classes of that population.

Accepted Answer

A) True 
 B)False

Question 5

Using the geometric model, if N(0)= 30 and λ = 1.20, what is the population size for year one (N₁)?

Accepted Answer

A) 25 
B) 28.8 
C) 30 
D) 36 
A) 25 
B) 28.8 
C) 30 
D) 36

Question 6

Discuss five factors known to cause extinction. Which of these factors is considered the leading cause of current extinctions and why?

Accepted Answer

There are several factors known to cause

Question 7

The life table is most useful in studying all the following areas of plant demography, EXCEPT

Accepted Answer

A) life cycles of perennial plants. 
B) life cycles of annual plants. 
C) seedling mortality and survival. 
D) population dynamics of perennial plants marked as seedlings. 
A) life cycles of perennial plants. 
B) life cycles of annual plants. 
C) seedling mortality and survival. 
D) population dynamics of perennial plants marked as seedlings.

Question 8

A ________ is the mean time between when a female is born and when she reproduces.

Accepted Answer

A) population cycle 
B) net reproductive rate 
C) generation time 
D) fecundity parameter 
A) population cycle 
B) net reproductive rate 
C) generation time 
D) fecundity parameter

Question 9

A type ________ survivorship curve is typical of populations in which the mortality rate of juveniles is very high.

Accepted Answer

The answer of A type ________ survivorship curve is typical...

Question 10

The ________ equals the number of births per female of age x.

Accepted Answer

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

Question 11

To obtain a clear and systematic picture of mortality and survival within a population, ecologists construct ________.

Accepted Answer

The answer of To obtain a clear and systematic picture...

Question 12

Most life tables have been constructed for

Accepted Answer

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

Question 13

A population's ________ factors determine demographic stochasticity.

Accepted Answer

A) extrinsic 
B) intrinsic 
C) independent 
D) predicted 
A) extrinsic 
B) intrinsic 
C) independent 
D) predicted

Question 14

Explain the trade-off between resistance and resilience for a large-bodied animal.

Accepted Answer

A large-bodied animal has grea

Question 15

A population in which λ equals one has reached a stable-age distribution.

Accepted Answer

A) True 
 B)False

Question 16

________ stochasticity is the random variation in birth and death rates that occur in populations from year to year due to natural disasters and other annual variations in the environment.

Accepted Answer

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

Question 17

The net reproductive rate represents the number of births per 1000 population per unit of time.

Accepted Answer

A) True 
 B)False

Question 18

An equation in which the derivative appears on the left-hand side is referred to as a

Accepted Answer

A) calculation. 
B) tangential equation. 
C) differential equation. 
D) derivative equation. 
A) calculation. 
B) tangential equation. 
C) differential equation. 
D) derivative equation.

Question 19

What is the Allee effect? Give several examples that illustrate the potential catastrophic impact of small size on population persistence.

Accepted Answer

The Allee effect is a phenomenon in ecol

Question 20

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

Accepted Answer

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

Exam 10: Population Growth

What is the significance of constructing a life table to an ecologist? What information is required to develop a life table and what is this information used for?

Because birth and death rates are not constant, tables and models developed by a demographer may have limited relevance to real populations.

Which of the following equations is used to calculate generation time?

In a given life table, x represents the age classes of that population.

Using the geometric model, if N(0)= 30 and λ = 1.20, what is the population size for year one (N₁)?

Discuss five factors known to cause extinction. Which of these factors is considered the leading cause of current extinctions and why?

The life table is most useful in studying all the following areas of plant demography, EXCEPT

A ________ is the mean time between when a female is born and when she reproduces.

A type ________ survivorship curve is typical of populations in which the mortality rate of juveniles is very high.

The ________ equals the number of births per female of age x.

To obtain a clear and systematic picture of mortality and survival within a population, ecologists construct ________.

Most life tables have been constructed for

A population's ________ factors determine demographic stochasticity.

Explain the trade-off between resistance and resilience for a large-bodied animal.

A population in which λ equals one has reached a stable-age distribution.

________ stochasticity is the random variation in birth and death rates that occur in populations from year to year due to natural disasters and other annual variations in the environment.

The net reproductive rate represents the number of births per 1000 population per unit of time.

An equation in which the derivative appears on the left-hand side is referred to as a

What is the Allee effect? Give several examples that illustrate the potential catastrophic impact of small size on population persistence.

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

The Nature of Ecology

Climate

The Aquatic Environment

The Terrestrial Environment

Ecological Genetics: Adaptation and Natural Selection

Plant Adaptations to the Environment

Animal Adaptations to the Environment

Life History Patterns

Properties of Populations

Intraspecific Population Regulation

Metapopulations

Interspecific Competition

Predation

Parasitism and Mutualism

Community Structure

Community Dynamics

Landscape Ecology

Systems Ecology

Ecosystem Energetic

Decomposition and Nutrient Cycling

Biogeochemical Cycles

Terrestrial Ecosystems

Aquatic Ecosystems

Coastal and Wetland Ecosystems

Population Growth, Resource Use, and Sustainability

Conservation Ecology

Global Climate Change

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