Population Dynamics Test (Ch.14) Flashcards Preview

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Flashcards in Population Dynamics Test (Ch.14) Deck (30)
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1

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

False

2

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

True

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.

False

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.

True

5

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

True

6

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

False

7

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

False

8

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

False

9

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

True

10

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

Clumped Dispersion

11

Population density can be measured in which of the following?

individuals/m2, individuals/hectare, individuals/ cm3
(all of the above)

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?

Carrying Capacity

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?

100 animals (N=Mn/m)

14

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

10 trees/ha (D=N/S)

15

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

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

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?

The population size did not change

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?

a type III survivorship pattern

18

Factors limiting reproductive potential inculde which of the following?

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

19

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

closed

20

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

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

21

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

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

22

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

predation

23

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

total # of species counted
space occupied

24

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

uniform dispersion

25

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

natality
mortality

26

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

carrying capacity

27

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

mark-recapture method

28

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

intraspecific

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...

parasitism

30

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

increased competition