Biology · Geography

Population Dynamics

940 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 civics population and settlement education, healthcare and human resource development concepts of individualism and society individual and society

Population born following 'baby boomers' is known as __________.

  1. Generation X

  2. Generation Y

  3. Baby boomers

  4. Both a and b
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The population born after baby boomers is referred to as X-generation. This generation had reduced adult supervision compared to previous generations, a result of increasing divorce rates and increased maternal participation in the workforce.

Multiple choice civics population and settlement education, healthcare and human resource development concepts of individualism and society individual and society

Which of the following statements defines the density of population?

  1. Number of persons living per unit area

  2. Number of persons living in a country

  3. Change in the number of inhabitants of a country during a specific period of time

  4. Absolute numbers added every year
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Population density is defined as the number of people present per square kilometre. Population density of India according to 2011 census is 382 persons per square kilometres.

Multiple choice civics population and settlement education, healthcare and human resource development concepts of individualism and society individual and society

Graphical representation of the total population of a country, males and female population ratio and old and young people ratio is classified as __________.

  1. Population density pyramid

  2. Population pyramid

  3. Resource pyramid

  4. Population characteristics pyramid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Graphical representation of total population of a country, male and female population ratio and old and young people ratio is classified as population pyramid. There are different types of it which include:

  • Stationary pyramid: in such countries, people of all the ages are present more or less equally.
  • The expansive pyramid is wide at younger ages and narrows at older ages.
  • The constrictive pyramid is narrow at the bottom, which means younger people are less in number.

Multiple choice civics population and settlement education, healthcare and human resource development concepts of individualism and society individual and society

Tool used to measure distribution of population is called _________.

  1. Population intensity

  2. Population density

  3. Death rate

  4. Birth rate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Tool used to measure distribution of population is called population density. Population density is defined as the number of people present per square kilometre. Population density of India according to 2011 census is 382 persons per square kilometres.

Multiple choice

One of the effects of rapid population increase in the world is ...

  1. decline in health standards

  2. decline in mortality rates

  3. increase in job opportunities

  4. increase in standard of living
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rapid population growth often strains infrastructure, public services, and sanitation systems, leading to a decline in health standards. While it can influence other factors, the direct negative impact on health services is a primary concern in geography.

Multiple choice rural development poverty rural economics economics

Census in India was conducted recently (2010). In the eyes of the economists and policymakers, India's demographics are very much favourable to growth. Which of the following statements is not in conformity with the traditional demographic characteristics of India and its relation with growth?

  1. India is a young country with low dependency ratio.

  2. More and more Indian youth under the age of 30 are getting better healthcare and access to quality technical education.

  3. The so-called middle class of India is happy as they have better housing and earning facilities.

  4. Indian youth are now the biggest consumers of luxurious goods; they spend discretionary income and enjoy the associated status.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The question asks for a statement that is NOT in conformity with traditional demographic characteristics related to growth. While youth consumption is a modern trend, it is not a traditional demographic characteristic that explains economic growth; rather, it is a result of changing economic conditions.

Multiple choice rural development poverty rural economics economics

What does infant mortality rate refer to?

  1. The ratio of number of children who die before their fifth birthday out of every $1000$ live births
  2. The ratio of number of children who die before their second birthday out of every $100$ live births
  3. The ratio of number of children who die before their third birthday out of every $500$ live births
  4. The ratio of number of children who die before their first birthday out of every $1000$ live births
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Infant Mortality Rate (IMR) is generally measured as a ratio of infant deaths under 1 year of age, registered in a calendar year to the total number of live births registered in the same year.

Multiple choice rural development poverty rural economics economics

When the number of poor is estimated as the proportion of people below the poverty line, it is known as _________.

  1. population Census

  2. poverty count

  3. head count ratio

  4. poverty trend
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
When the number of poor is estimated as the proportion of people below the poverty line, it is known as ‘Head Count Ratio’. Population census is conducted for estimating the population of the country. Poverty count and poverty trend are not any kind of  measure. 
Multiple choice zoology human population population ecology population size population and how it changes

Total number of individuals of a species per unit area and per unit time is called 

  1. Population size

  2. Population density

  3. Demography

  4. Population dynamics
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Population density is the number of individuals present per unit area or volume at a given time. If the total number of individuals is represented by letter N and the number of units of space (area for land organisms and volume for water organisms) by letter S, then the population density D can be represented as D =N/S. For instance, number of animals per square kilometer, number of trees per acre in a forest, etc. So, the correct answer is 'Population density'.

Multiple choice zoology human population population ecology population size population and how it changes

For which of the following cases, population density can be easily determined by utulising non-biological parameter?

  1. Fish density

  2. Density of Bactria in culture plate

  3. Siberian cranes at Bharatpur wetlands

  4. Tiger census
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Sometimes, for certain ecological investigations, there is no need to the absolute population densities. Relative densities serve the  purpose equally well. In this case, population size is indirectly estimated without actually counting them. For example, the number of fishes caught per trap is good enough measure of its total population density in the lake. The tiger census in our National park and tiger reserves is often based on pug marks (animal's ft print ) and fecal pellets. So, the correct answer is 'Tiger census'.
Multiple choice zoology human population population ecology population size population and how it changes

Which of the following is not an example of using relative density to measure population density in a certain area?

  1. Counting pug marks of tigers to find population density of tigers a forest

  2. Counting the number of fishes caught in a trap to find population density of fishes in a lake

  3. Measuring biomass of bacterial culture to find out population density of bacteria in a petri dish

  4. Measuring biomass of phytoplanktons in 1 cc water to find out population density of phytoplanktons in a lake
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Option D is correct,  because measuring of biomass of phytoplanktons is very time consuming and It is a microscopic task to measure only PHYTOPLANKTON in 1 cc water except other species found in the given water. 

Multiple choice zoology human population population ecology population size population and how it changes

In some cases, polpulation density is measured in terms of biomass rather than in terms of numbers becouse ________________________.

  1. it is a more meaningful measure when the considered organisms vary greatly in size.

  2. it is more convenient when population is huge and counting is impossible or very time consuming

  3. it is a relatively constant measure

  4. both a and b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Although the total number is most approprite measure of population density, but in some cases it is difficult to determine.In a forest area, spouse there are 200 Pathenium plants but only a single huge banyan tree with a large canopy. Stating that the population density of banyan is low relative to that of Pathenium, amount to underestimating the great role of bayan in that forest community.

Multiple choice zoology human population population ecology population size population and how it changes

In N = population density at time t, then population density at time +1 can be written as 
$N _t+1 = N _1 + [(A +B) - (C + D)]$
Select the correct option for A, B, C and D in the above equation. 

  1. A can be mortality and B can be natality

  2. B can be immigration and C can be natality

  3. C can be mortality and D can be immigration

  4. A can be natality and D can be emigration
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A and B are nasality and immigration. They add to population density. C and D are mortality and emigration. They decrease population density 

Multiple choice zoology human population population ecology population size population and how it changes

Which of the following would necessarily decrease the density of a population in a given habitat?

  1. Natality > mortality

  2. Immigration > emigration

  3. Mortality and emigration

  4. Natality and immigration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Population density in a given habitat is influenced by four processes:
- Natality : It is the number of birth in a population during a given period of time,
- Mortality : It is the number of deaths in a population during a given period of time.
-Immigration : Number of individuals coming from other habitats in a given period of time 
-Emigration : Number of individuals exiting form a given population in a given period of time.

Mortality and emigration will, therefore decrease the population density while natality and immigration will increase it.
So, the correct answer is 'Mortality and emigration'.