Biology: The Dynamics of Life, California Edition

Chapter 4: Population Biology

Population Biology

1.
Which of these is an explanation of why a population can fluctuate once it has reached carrying capacity?
A)Limiting factors can influence the number of organisms in a population once it reaches carrying capacity.
B)A population of organisms always grows rapidly once it reaches carrying capacity.
C)All populations experience exponential growth once they reach carrying capacity.
D)The number of organisms decreases but never increases once it reaches carrying capacity.
2.
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Based on the data in the graph, which of these statements is true?
A)The population size shows a straight-line increase.
B)At the beginning of the year, there are no houseflies in the population.
C)All of the population will be dead at the end of one year.
D)Growth of the housefly population begins to increase rapidly about 3/4 of the way through the first year.
3.
Which of these is NOT a characteristic of a rapid life-history organism?
A)long life span
B)small body size
C)early reproduction age
D)rapid period of time until maturation
4.
The population distribution for a country shows that each age structure is about the same size. What type of population growth is this country experiencing?
A)stable growth
B)slow growth
C)rapid growth
D)zero growth
5.
An environment's __________ is the number of organisms of a certain species that can be supported indefinitely.
A)stability
B)density
C)carrying capacity
D)exponential growth
6.
Which of these is NOT a limiting factor to the growth of a population?
A)long-term abundance of space
B)introduction of disease
C)availability of food
D)increasing population of predators
7.
Which of these equations represents zero population growth?
A)Birthrate - Death rate > 0
B)Birthrate - Death rate = 0
C)Birthrate + Death rate = 0
D)Birthrate + Death rate < 0
8.
When is it possible for a population growth rate to be less than zero?
A)The population growth rate can never be less than zero.
B)When the birthrate is equal to the death rate.
C)When the death rate is greater than the birthrate.
D)When the birthrate is greater than the death rate.
9.
__________ is a density-dependent factor.
A)Competition
B)Temperature
C)Floods
D)Drought
10.
An elephant is considered to have a slow life-history pattern. Which of these characteristics would be matched to an elephant?
A)long lifespan
B)mature quickly
C)unstable environment
D)reproduce early
11.
The population of a country is experiencing a slow doubling time. Which of these is true of that country?
A)It can also be categorized as a developing country.
B)It can also be categorized as a developed country.
C)It has zero population growth.
D)It will never double its population.
12.
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What does the dotted line represent on this graph?
A)predation
B)birth rate
C)carrying capacity
D)death rate
13.
A population of rabbits experiences an increase over time. Which of these statements about that population is true?
A)The population may experience exponential growth due to resource depletion.
B)The population may face increased competition due to resource depletion.
C)The population my face decreased competition due to resource depletion.
D)The population may experience straight-line growth due to resource depletion.
14.
Which of these is the study of human population size and the factors that influence it?
A)meteorology
B)botany
C)demography
D)ecology
15.
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Based on the data in the graph, which of the colonies was least affected by temperature as a limiting factor?
A)4
B)1
C)2
D)3
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