Population Dynamics Test (Ch.14)

Question 1

Quadrant Sampling is the most effective method for determining population size for any species

Answer 1

False

Question 2

The sampling technique a biologist uses to determine population size depends on a variety of factors.

Answer 2

True

Question 3

The maximum number of organisms that can be sustained by available resources over a given period of time is known as the ecological load.

Answer 3

False

Question 4

When organisms are found in certain parts of their habitat but not others as determined by habitat restrictions, biologists describe this as clumped dispersion.

Answer 4

True

Question 5

The study of changes in population characteristics is known as population dynamics.

Answer 5

True

Question 6

A factor limiting population growth that has a greater impact as the density increase is said to be density independent.

Answer 6

False

Question 7

An ecological interaction between different species competing for the same resource is said to be intraspecific.

Answer 7

False

Question 8

Any essential resource that is in shortest supply is known as the density-independent factor.

Answer 8

False

Question 9

The nonpoisonous viceroy butterfly resembles the poisonous monarch butterfly. This is an example of mimicry as a defense mechanism.

Answer 9

True

Question 10

Which of the population dispersion patterns is most often found in natural populations?

Answer 10

Clumped Dispersion

Question 11

Population density can be measured in which of the following?

Answer 11

individuals/m2, individuals/hectare, individuals/ cm3

all of the above

Question 12

The maximum number of organisms that can be sustained by available resources over a given period of time is known as which of the following?

Answer 12

Carrying Capacity

Question 13

In a small mark-recapture study, 10 animals are marked, then released. Later, of 10 animals trapped, only 1 has a mark. What is the total size of the population?

Answer 13

100 animals (N=Mn/m)

Question 14

An orchard contains 20 apple trees in an area of 2.0 ha. Determine the density of the tree population.

Answer 14

10 trees/ha (D=N/S)

Question 15

Radio transmitters tracked by satellite can be used to monitor which of the following?

Answer 15

hibernating bears, Siberian tigers, moose, beluga whales (all of the above)

Question 16

In a population of birds being studied over a limited time period, 4 eggs hatched, 6 birds leave the area, 3 are eaten by cats, and 5 move into the area. What is the population change over the period of study?

Answer 16

The population size did not change

Question 17

A population with high mortality rates among the young and very low mortality rates among sexually mature adults and high mortality rates among the very old members exhibit which of the following?

Answer 17

a type III survivorship pattern

Question 18

Factors limiting reproductive potential inculde which of the following?

Answer 18

migration, disease, mating success, food availability (all of the above)

Question 19

A population whose growth is influenced only by natality (birth rate) and mortality, is described as which of the following?

Answer 19

closed

Question 20

In natural populations, exponential growth does not continue indefinitely because of limited amount(s) of which of the following?

Answer 20

energy, water, shelter, space (all of the above)

Question 21

As the number of raccoons in the forest increases, the availability of nesting sites limits population growth. This describes which of the following?

Answer 21

a density-dependent factor and intraspecific competition (both a and c)

Question 22

Polar bears kill and eat seals for survival. This is described as which of the following?

Answer 22

predation

Question 23

To determine population density, a scientist must know the ________ and the ________.

Answer 23

total # of species counted

space occupied

Question 24

The pattern in which orgainisms are equally spaced throughout their habitat is known as…

Answer 24

uniform dispersion

Question 25

On an isolated island, the two determinants of population dynamics are _______ and _______.

Answer 25

natality

mortality

Question 26

The maximum number of organisms that can be sustained by available resources over a given period of time is the…

Answer 26

carrying capacity

Question 27

The most accurate method of estimating the number of fish in a large school in the ocean would be…

Answer 27

mark-recapture method

Question 28

When two members of the same species rely on the same resources, ________ competition results.

Answer 28

intraspecific

Question 29

In many ways, a science classroom can be consisdered a model of an ecosystem. A student copies another student’s work, contributing nothing. The student who did the work feels hurt and used. Ecologically, this relationship can be described as…

Answer 29

parasitism

Question 30

Exotic Species such as the zebra mussel, often disrupt the ecology of the area into which they have been introduced because they have …

Answer 30

increased competition