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 commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

A logistic growth curve depicting a population that is limited
by a definite carrying capacity is shaped like the letter

  1. J

  2. L

  3. M

  4. S
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A logistic growth curve that is limited by a definite carrying capacity is shaped like the letter 'S' or a sigmoid curve, which is differentiated into three parts the Lag phase, the Log phase or the exponential growth phase and the stationary or plateau phase. At this phase the amount of resources cannot support the growing population, due to which the number of members in the population is prevented from increasing

So, the correct answer is 'S'

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

dN/dt is 

  1. Rate of births

  2. Rate of deaths

  3. Change in population size

  4. Carrying capacity
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The rate of change in a population can be defined as the ratio of total change in population and time taken for that change. Change in population size can be defined as difference in population size at the end and between the beginning of a particular time period

So, the correct answer is 'Change in population size'

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

In ecology, N/S represents ____________.

  1. Population density

  2. Rate of growth

  3. Rate of deaths

  4. Rate of births
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In ecological formulas, N typically represents the total population size and S represents the area or space, so N/S represents population density.

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

Sigmoid growth curve occurs where growth pattern is 

  1. Logistic

  2. Exponential

  3. Accretionary

  4. Geometric
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Logistic growth model:- Sigmoid growth curve occurs where growth pattern is logistic. Unconstrained natural growth is exponential growth. A biological population with food, space to grow, and no threat from predators, tends to grow at rate proportional to population.
$\dfrac{dP}{dt}=rp$
where p$=$population function of time t
r$=$ proportionality constant.
Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

Asymptote in a logistic growth curve is obtained when:

  1. $K=N$
  2. $K>N$
  3. $K<n$< div=""></n$<>

  4. The value of r approaches zero
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In logistic growth, the asymptote (carrying capacity K) is reached when N = K (population equals carrying capacity). At this point, population growth stops because resources limit further growth. When K > N, population is still growing. Option C has garbled formatting but would represent K < N, which is impossible.

Multiple choice commercial applications population - the increasing numbers and rising problem impact of depletion of natural resources population growth models depletion of resources

Choose the incorrect one.

  1. In logistic growth equation when N $<$ K then r $> 0$
  2. In logistic growth equation when N$=$K then r$=$constant
  3. In logistic growth equation N $>$ K then r $< 0$
  4. In logistic growth equation N $>$ K then r $> 0$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Answer is A. 
If N is very small compared to K, then the population growth rate will be a small positive number. This means the population is slowly getting larger because there are a few more births than deaths

Multiple choice geography ideas of development study of population in tamil nadu population and migration human geography in tamil nadu

The difference between birth and death rates, when expressed in percentage, is known as the _____.

  1. Growth rate

  2. Index

  3. Rise

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

The difference between birth and death rates gives the natural increase of population of regions. When expressed in percentage it is known as the growth rate. The annual growth rate of Tamil Nadu's population is 1.1% which is lower than that of India.

Multiple choice population change population dynamics population : distribution, density and growth population, migration, settlements geography

Infant Mortality Rate refers to -

  1. Number of children dying before reaching the school going age

  2. Number of children dying reaching 3 years of age

  3. Proportion of children dying within a year of their birth

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Infant Mortality Rate (or IMR) indicates the number of children that die before the age of one year as a proportion of 1000 live children born in that particular year. Kerala has the lowest Infant Mortality Rate of 12 in India because it has adequate provision of basic health and educational facilities.

Multiple choice population change population dynamics population : distribution, density and growth population, migration, settlements geography

The difference between the birth rate and death rate is called ________.

  1. Natural growth rate

  2. Death rate

  3. Birth rate

  4. Fertility rate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

There will growth in population, If the birth rate is higher than death rate.The difference between birth rate and the death rate is called natural growth rate of population.

Multiple choice population change population dynamics population : distribution, density and growth population, migration, settlements geography

A country experiences population explosion when it gets stuck for long in a stage of demographic transition in which-

  1. Birth rate is high and death rate is high.

  2. Birth rate is low and death rate is low.

  3. Death rate falls steeply but the birth rate continues to be high.

  4. Both birth rate and death rate fall steeply.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Demographic transition theory can be used to describe and predict the future population of any area. The theory tells us that population of any region changes from high births and high deaths to low births and low deaths as society progresses from rural agrarian and illiterate to urban industrial and literate society. 

Multiple choice population change population dynamics population : distribution, density and growth population, migration, settlements geography

In stage 3 both birth and death rate are:

  1. high

  2. low

  3. stable

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To predict the future population of an area, demographic transition theory can be used. This theory explains 3 staged model of demographic transition: 

  • stage (i) High birthrate, high death rate, low growth rate : Example Bangladesh 
  • stage (ii) Initially high birth rate, low death rate, high growth rate- example India 
  • stage (iii) Low birth rate, low death rate, stable or low growth rate - example Japan.

Multiple choice population change population dynamics population : distribution, density and growth population, migration, settlements geography

According to Demographic Transition, we are in which stage?

  1. Stage 1

  2. Stage 2

  3. Stage 3

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

To predict the future population of an area, demographic transition theory can be used. This theory explains 3 staged model of demographic transition: 

  • stage (i) High birthrate, high death rate, low growth rate : Example Bangladesh 
  • stage (ii) Initially high birth rate, low death rate, high growth rate- example India 
  • stage (iii) Low birth rate, low death rate, stable or low growth rate - example Japan.

Multiple choice population change population dynamics population : distribution, density and growth population, migration, settlements geography

A country is said to be ready to enjoy demographic dividend when-

  1. The proportion of youth in total population increases fast

  2. The death rate falls across all the age groups.

  3. The birth rate falls across all the age groups.

  4. The number of elder citizens rises very fast.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Demographic Dividend is a phenomenon which occurs when the proportion of working population out of the total population is high. A country is expected to reap the demographic dividend when the share of its working population is larger than the share of its non-working population. India is currently going through a phase of the demographic dividend.