Biology · Geography

Population Dynamics

978 Questions

Explore key concepts in population dynamics through these practice questions. The focus is on demographic transition models, population pyramids, and life history theory. These topics are useful for general studies and biology exams.

Demographic transition theoryPopulation pyramidsMathematical growth modelsLife history theory

Population Dynamics Questions

Multiple choice

What does an urn-shaped pyramid of age ratio signify?

  1. Population containing a large number of young people

  2. Moderate proportion of young to old

  3. Fewer reproductive individuals

  4. Low fertility and low mortality
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An urn-shaped pyramid signifies fewer reproductive individuals in the other two age categories. #

Multiple choice

Which of the following is a wrong formula of calculating corresponding fertility measure?

  1. Birth rate = (Number of live births in a given area per estimated mid-year population) x 1000

  2. Growth rate = ((Live births + Net migrants - Deaths during a year)/ Mid-year population) x 1000

  3. Natural increase rate = Crude birth rate - Maternal mortality rate

  4. Crude death rate = (Number of deaths in a year per mid-year population) x 1000
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Natural increase rate = Crude birth rate - Crude death rate

Multiple choice

Directions: For this question, select the best of the answer choices given.

Between 1975 and 1985, nursing-home occupancy rates averaged 87 percent of capacity, while admission rates remained constant, at an average of 95 admissions per 1,000 beds per year. Between 1985 and 1988, however, occupancy rates rose to an average of 92 percent of capacity, while admission rates declined to 81 per 1,000 beds per year. If the statements above are true, which of the following conclusions can be most properly drawn?

  1. The average length of time nursing-home residents stayed in nursing homes increased between 1985 and 1988.

  2. The proportion of older people living in nursing homes was greater in 1988 than in 1975.

  3. Nursing home admission rates tend to decline whenever occupancy rates rise.

  4. Nursing homes built prior to 1985 generally had fewer beds than did nursing homes built between 1985 and 1988.

  5. The more beds a nursing home has, the higher its occupancy rate is likely to be.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The data shows that while admission rates dropped from 95 to 81 per 1,000 beds, occupancy rose from 87% to 92% between 1985-1988. For occupancy to increase despite fewer admissions, current residents must be staying longer on average. This is a mathematical necessity - if people stayed the same length of time and admissions dropped, occupancy would decrease, not increase. Option B incorrectly assumes about proportion of older people. Option C incorrectly claims a causal trend from limited data. Option D brings in irrelevant information about bed count. Option E is unsupported by the data.

Multiple choice

Directions: For this question, select the best of the answer choices given.

Between 1990 and 1998, occupancy in Branson Hospital averaged 79 percent of capacity, while admission rates remained constant, at an average of 9 admissions per 100 beds per year. Between 1998 and 2002, however, occupancy rates increased to an average of 85 percent of capacity, while admission rates declined to 8 per 100 beds per year. Which of the following conclusions can be most properly drawn from the info given above?

  1. The average stay for Branson Hospital residents rose between 1998 and 2002.

  2. The proportion of children staying in Branson hospital was greater in 2002 than in 1990.

  3. Hospital admission rates tend to decline whenever occupancy rates rise.

  4. Hospitals built prior to 1998 generally had fewer beds than did hospitals built between 1998 and 2002.

  5. The more beds a nursing home has, the higher its occupancy rate is likely to be.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The best answer is (1). Choice (1) receives support from the fact stated above: between 1998 and 2002, Branson hospital occupancy rates rose though admission rats declined.

Multiple choice

The concept of over population is based on the

  1. availability of food in the area

  2. supporting capacity of the land in terms of varied human occupation

  3. absolute number of people in an area

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Overpopulation is a relative concept based on the carrying capacity of an area - the ability of land to support human occupation sustainably. It's not about absolute population numbers but whether resources can adequately support the population. Option A focuses only on food, while option C ignores resource availability entirely.

Multiple choice

Directions: This question presents a sentence, all or part of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is the best, choose the first answer; otherwise choose any one of the others.

In many of the Scandinavian countries, the growth of population has been nothing during the last two decades.

  1. growth of population has been nothing during the last two decades

  2. growth of population has been almost nothing during the last two decades

  3. growth of population has been nil during the last two decades

  4. growth of population has been none during the last two decades

  5. growth of population has been little during the last two decades
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Explanation for (1): Error of diction. Growth can be 'nil' but not 'nothing'.

Explanation for (2): This option fails to correct the error of diction.

Explanation for (3): Error of diction. Growth can be 'nil' but not 'nothing', hence (3) is the best choice.
Explanation for (4): Growth can be 'nil' but not 'nothing'. Explanation for (5): This option changes the meaning of the sentence.

Multiple choice

Populations termed r-strategists

  1. have J-shaped growth curves

  2. have type III survivorship curves

  3. are usually pioneer species

  4. All of the above are correct
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

r-strategists species are those that place emphasis on a high growth rate and typically exploit less-crowded ecological niches and produce many offspring, each of which has a relatively low probability of surviving to adulthood.

Multiple choice

Directions: The underlined part of the sentence below may have some errors. Five options are given below the sentence. Choose the option that improves the sentence. If the sentence has no error, choose option 5 as your answer.

As technological capabilities improved and life expectancy increased, the numbers of children per family went down, demonstrating the fact that nature keeps on balancing the population figure.

  1. the numbers of children per family went down, is demonstrating the fact that nature keeps on balancing the population figure

  2. the number of children per family went down, demonstrates the fact that nature keeps on balancing the population figure

  3. the number of children per family went down, demonstrating fact that nature keeps on balancing the population figure

  4. the number of children per family went down, demonstrating the fact that nature keeps on balancing the population figure

  5. No improvement required
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Here, singular 'number' rectifies the error of plural 'numbers'. 'Numbers' means 'verses' or 'poetry' which does not fit in the framework of the meaning of the original sentence. 'Number' means 'counting' and it fits in the framework of the meaning of original sentence.

Multiple choice

Which one of the following is the correct sequence, in the decreasing order of total fertility rate of the given regions?

  1. East Asia / Pacific countries - CIS / Baltic countries - South Asia - Latin America

  2. South Asia - Latin America - East Asia / Pacific countries - CIS / Baltic countries

  3. South Asia - CIS / Baltic countries - East Asia / Pacific countries - Latin America

  4. East Asia / Pacific countries - Latin America - South Asia - CIS / Baltic countries
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total fertility rates historically follow the pattern: South Asia (highest), followed by CIS/Baltic, East Asia/Pacific, and Latin America (lowest). This reflects demographic transition stages across regions.