Chapter 5 Biology

25 July 2022
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question
Which will reduce competition within a species' population? a. fewer individuals b. higher birthrate c. fewer resources d. higher population density
answer
a. fewer individuals
question
Countries in the first stage of demographic transition have a. a low death rate and a high birthrate. b. a high death rate and a low birthrate. c. a slowly growing population. d. more old people than young people.
answer
a. a low death rate and a high birthrate.
question
Which density-dependent factors other than the predator/prey relationship affected the populations of moose and wolves on Isle Royale? a. extreme temperatures for the moose and flooding for the wolves b. parasitic wasps for the wolves and clear-cut forest for the moose c. a hurricane followed by drought for both moose and wolves d. food availability for the moose and disease for the wolf
answer
d. food availability for the moose and disease for the wolf
question
Which of the following is NOT likely to be a limiting factor on the sea otter population? a. disease b. competition c. drought d. predation
answer
c. drought
question
The human population grew slowly from the beginning of human existence, and then began to grow exponentially about 200 years ago. True False
answer
False
question
Which of the following is a density-independent limiting factor? a. earthquake b. disease c. emigration d. parasitism
answer
a. earthquake
question
Resource shortages triggered by increasing population size are density-independent limiting factors. True False
answer
False
question
In countries like India, the human population is growing a. exponentially. b. transitionally. c. logistically. d. demographically.
answer
a. exponentially.
question
Which would be least likely to be affected by a density-dependent limiting factor? a. a small, scattered population b. a population with a high birthrate c. a large, dense population d. a population with a high immigration rate
answer
a. a small, scattered population
question
The human population experienced exponential growth after a. agriculture began. b. plowing and irrigation began. c. the bubonic plague began. d. the Industrial Revolution began.
answer
d. the Industrial Revolution began.
question
A disease resulting in the deaths of one third of a dense population of bats in a cave would be a a. density-dependent limiting factor. b. result of exponential growth. c. density-independent limiting factor. d. nutrient-limiting factor.
answer
a. density-dependent limiting factor.
question
The population of a country whose age structure has many more children than people over 40 years of age will probably decrease rapidly in the future. True False
answer
False
question
The anticipated human population by the year 2050 is about a. 7.8 billion. b. 9 billion. c. 9 trillion. d. 78 billion.
answer
b. 9 billion.
question
Which of the following would NOT be a limiting factor to the size of a large, dense population? a. a struggle for food, water, space, or sunlight b. predator/prey relationships c. a struggle to find shelter from a natural disaster d. parasitism and disease
answer
...
question
A biotic or an abiotic resource in the environment that causes population size to decrease is a a. carrying capacity. b. limiting nutrient. c. limiting factor. d. growth factor.
answer
c. limiting factor.
question
A limiting nutrient is to ecosystem productivity as a limiting factor is to population a. birthrate. b. density. c. growth rate. d. immigration.
answer
c. growth rate.
question
Demography is the scientific study of a. parasitism and disease. b. modernized countries. c. human populations. d. economic transitions.
answer
c. human populations
question
How can a diagram of a population's age structure predict how it can grow? a. It shows how many people are at reproductive ages. b. It shows how many people will probably die within a few years. c. It shows how many people are entering the population by birth. d. all of the above
answer
...
question
About 500 years ago, the world's population started a. decreasing. b. to reach carrying capacity. c. growing more rapidly. d. to level off.
answer
c. growing more rapidly.
question
Predators can limit the size of populations by weakening their hosts, resulting in disease or death. True False
answer
False
question
Water lilies do not grow in desert sand because water availability to these plants in a desert is a. a limiting factor. b. the carrying capacity. c. a competition factor. d. none of the above
answer
a. a limiting factor.
question
Human population growth has slowed down in a. China. b. the United States. c. India. d. Africa.
answer
b. the United States.
question
Demographic transition begins with changes in society that a. lower the birthrate. b. increase the birthrate. c. lower the death rate. d. increase the death rate.
answer
c. lower the death rate.
question
Which country has not yet completed the demographic transition? a. United States b. India c. Great Britain d. Japan
answer
b. India
question
One of the best-known mechanisms of population control is the parasite-host relationship. True False
answer
False
question
Demographic transition is change from high birthrates and high death rates to a. exponential growth. b. a low birthrate and a low death rate. c. a low birthrate and a high death rate. d. indefinite growth.
answer
b. a low birthrate and a low death rate.
question
Each of the following is a density-dependent limiting factor EXCEPT a. competition. b. seasonal cycles. c. crowding. d. disease.
answer
b. seasonal cycles.
question
The size of the human population tends to increase with time. True False
answer
True
question
In Rwanda, there are more young children than teenagers, and more teenagers than adults. This age structure indicates a population that a. has stopped growing. b. will double in 30 years. c. has a steady growth rate. d. will decrease in 30 years.
answer
b. will double in 30 years.
question
An indication that a country has completed the demographic transition is a low birthrate and a low death rate. True False
answer
True
question
Most of the worldwide human population is growing exponentially because a. human populations have not reached their exponential curve. b. human populations have not yet completed the demographic transition. c. human populations do not conform to the logistic model. d. science and technology have made it possible.
answer
b. human populations have not yet completed the demographic transition.
question
Density-dependent limiting factors affect all populations, whether the population size is two or a hundred. True False
answer
False
question
Human activities, such as damming rivers, are density-independent limiting factors. Select one: True False
answer
True
question
All of the following are limiting factors EXCEPT a. immigration. b. competition. c. predation. d. human disturbances.
answer
a. immigration.
question
There are 150 Saguaro cacti plants per square kilometer in a certain area of Arizona desert. To which population characteristic does this information refer? Select one: a. growth rate b. geographic distribution c. age structure d. population density
answer
d. population density
question
Which are two ways a population can decrease in size? a. immigration and emigration b. increased death rate and immigration c. decreased birthrate and emigration d. emigration and increased birthrate
answer
c. decreased birthrate and emigration
question
Which of the following is NOT one of the factors that play a role in population growth rate? Select one: a. immigration b. death rate c. emigration d. demography
answer
d. demography