Question 1

The distribution of social animals is likely to be

Accepted Answer

A) clumped. 
B) random. 
C) uniform. 
D) constant. 
E) homogeneous. 
A) clumped. 
B) random. 
C) uniform. 
D) constant. 
E) homogeneous.

Question 2

The effect of resource availability on population size determines

Accepted Answer

A) the carrying capacity of the environment. 
B) exponential growth. 
C) the doubling time of a population. 
D) the population's biotic potential. 
E) all of these. 
A) the carrying capacity of the environment. 
B) exponential growth. 
C) the doubling time of a population. 
D) the population's biotic potential. 
E) all of these.

Question 3

Which of the following is NOT true for a population growing exponentially?

Accepted Answer

A) The number of individuals added to the population in a year is greater than it was the previous year. 
B) The population growth rate increases year after year. 
C) Its r remains constant in the short-run. 
D) The doubling time remains constant. 
E) All of these are NOT true. 
A) The number of individuals added to the population in a year is greater than it was the previous year. 
B) The population growth rate increases year after year. 
C) Its r remains constant in the short-run. 
D) The doubling time remains constant. 
E) All of these are NOT true.

Question 4

Questions refer to the figure above illustrating logistic growth.
  
-The effect of population growth limiting factors begin to become evident at about

Accepted Answer

A) A. 
B) B. 
C) C. 
D) D. 
E) E. 
A) A. 
B) B. 
C) C. 
D) D. 
E) E.

Question 5

Population size is related to

Accepted Answer

A) deaths. 
B) births. 
C) migration. 
D) immigration. 
E) all of these. 
A) deaths. 
B) births. 
C) migration. 
D) immigration. 
E) all of these.

Question 6

As population density increases, the chance of __________ also increases.

Accepted Answer

A) parasitism 
B) disease 
C) predation 
D) competition 
E) all of these 
A) parasitism 
B) disease 
C) predation 
D) competition 
E) all of these

Question 7

A cohort is

Accepted Answer

A) a group of individuals of the same species born during the same time interval. 
B) any member of the same species. 
C) a group of individuals with the same parents. 
D) a group of individuals of the same sex. 
E) any group of closely related individuals. 
A) a group of individuals of the same species born during the same time interval. 
B) any member of the same species. 
C) a group of individuals with the same parents. 
D) a group of individuals of the same sex. 
E) any group of closely related individuals.

Question 8

Limiting factors

Accepted Answer

A) produce more pronounced effects as a population grows. 
B) prevent indefinite, exponential population growth. 
C) can be either density-dependent or density-independent. 
D) acting together constitute environmental resistance to population growth. 
E) include all of these. 
A) produce more pronounced effects as a population grows. 
B) prevent indefinite, exponential population growth. 
C) can be either density-dependent or density-independent. 
D) acting together constitute environmental resistance to population growth. 
E) include all of these.

Question 9

Biotic potential is controlled by all of the following factors EXCEPT

Accepted Answer

A) the age of individuals within the population. 
B) the resources available for each individual. 
C) fecundity rate. 
D) environmental disturbances. 
E) all of these control biotic potential. 
A) the age of individuals within the population. 
B) the resources available for each individual. 
C) fecundity rate. 
D) environmental disturbances. 
E) all of these control biotic potential.

Question 10

A J-shaped population growth curve becomes an S-shaped one

Accepted Answer

A) as more resources become available. 
B) if the data are plotted on semi-log graph paper. 
C) as the carrying capacity is reached. 
D) if reproduction stops. 
E) if any of these occur. 
A) as more resources become available. 
B) if the data are plotted on semi-log graph paper. 
C) as the carrying capacity is reached. 
D) if reproduction stops. 
E) if any of these occur.

Question 11

Which of the following is NOT true regarding biotic potential? It

Accepted Answer

A) varies from one species to another. 
B) is related to the timing of the first reproduction. 
C) is related to the frequency of reproduction. 
D) is related to the number of offspring produced. 
E) increases as population density increases. 
A) varies from one species to another. 
B) is related to the timing of the first reproduction. 
C) is related to the frequency of reproduction. 
D) is related to the number of offspring produced. 
E) increases as population density increases.

Question 12

A population of wolf spiders exemplifies a __________ population distribution.

Accepted Answer

A) clumped 
B) random 
C) uniform 
D) constant 
E) homogeneous 
A) clumped 
B) random 
C) uniform 
D) constant 
E) homogeneous

Question 13

Reznick and Endler were interested in the effects of __________ on guppy evolution.

Accepted Answer

A) predation 
B) competition 
C) population density 
D) density-independent factors 
E) mating rituals 
A) predation 
B) competition 
C) population density 
D) density-independent factors 
E) mating rituals

Question 14

The distribution of highly competitive animals is likely to be

Accepted Answer

A) clumped. 
B) random. 
C) uniform. 
D) constant. 
E) homogeneous. 
A) clumped. 
B) random. 
C) uniform. 
D) constant. 
E) homogeneous.

Question 15

The size of a population is affected by all of the following EXCEPT

Accepted Answer

A) biotic potential. 
B) trophic level. 
C) carrying capacity of the environment. 
D) death rate. 
E) birth rate. 
A) biotic potential. 
B) trophic level. 
C) carrying capacity of the environment. 
D) death rate. 
E) birth rate.

Question 16

All of the following may be involved in feedback mechanisms in natural communities when populations become too dense EXCEPT

Accepted Answer

A) density-dependent factors. 
B) limiting factors. 
C) biotic potential. 
D) physical factors. 
E) biotic factors. 
A) density-dependent factors. 
B) limiting factors. 
C) biotic potential. 
D) physical factors. 
E) biotic factors.

Question 17

The average number of individuals in a specified portion of habitat is the population's

Accepted Answer

A) distribution. 
B) carrying capacity. 
C) density. 
D) size. 
E) birth rate. 
A) distribution. 
B) carrying capacity. 
C) density. 
D) size. 
E) birth rate.

Question 18

Which of the following is true regarding quadrats?

Accepted Answer

A) A full population count is usually impractical. 
B) Quadrats are plots of land of the same size and shape that can be used to randomly count a single non-migrating species. 
C) Once several quadrats are counted, an estimate of number of a particular organism can be extrapolated for a given land mass. 
D) Sampling error is common if the size of the quadrats is not large. 
E) All of these are correct. 
A) A full population count is usually impractical. 
B) Quadrats are plots of land of the same size and shape that can be used to randomly count a single non-migrating species. 
C) Once several quadrats are counted, an estimate of number of a particular organism can be extrapolated for a given land mass. 
D) Sampling error is common if the size of the quadrats is not large. 
E) All of these are correct.

Question 19

Organisms that demonstrate type I survivorship are characterized by

Accepted Answer

A) high r, small offspring. 
B) low r, small offspring. 
C) low r, large offspring. 
D) high r, large offspring. 
E) low r, large population size. 
A) high r, small offspring. 
B) low r, small offspring. 
C) low r, large offspring. 
D) high r, large offspring. 
E) low r, large population size.

Question 20

The work of Reznick and Endler with guppies shows all of the following EXCEPT that

Accepted Answer

A) life history traits can be inherited. 
B) life history traits evolve. 
C) life history traits can be altered over a short period of time. 
D) predation does not influence the modification of life history traits. 
E) life history traits are coded for in DNA. 
A) life history traits can be inherited. 
B) life history traits evolve. 
C) life history traits can be altered over a short period of time. 
D) predation does not influence the modification of life history traits. 
E) life history traits are coded for in DNA.

Exam 45: Population Ecology

The distribution of social animals is likely to be

The effect of resource availability on population size determines

Which of the following is NOT true for a population growing exponentially?

Questions refer to the figure above illustrating logistic growth. -The effect of population growth limiting factors begin to become evident at about

Population size is related to

As population density increases, the chance of __________ also increases.

A cohort is

Limiting factors

Biotic potential is controlled by all of the following factors EXCEPT

A J-shaped population growth curve becomes an S-shaped one

Which of the following is NOT true regarding biotic potential? It

A population of wolf spiders exemplifies a __________ population distribution.

Reznick and Endler were interested in the effects of __________ on guppy evolution.

The distribution of highly competitive animals is likely to be

The size of a population is affected by all of the following EXCEPT

All of the following may be involved in feedback mechanisms in natural communities when populations become too dense EXCEPT

The average number of individuals in a specified portion of habitat is the population's

Which of the following is true regarding quadrats?

Organisms that demonstrate type I survivorship are characterized by

The work of Reznick and Endler with guppies shows all of the following EXCEPT that

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

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