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

The term population density refers to:

  1. Individuals/area

  2. Species number

  3. Lifespan

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

Population density is defined as the number of individuals of a species per unit area. It measures how crowded a population is within a specific space.

Multiple choice

Which is not a factor in a changing population sizes

  1. Births

  2. Immigration

  3. Lost members

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

Population size changes due to births, deaths, immigration, and emigration. 'Lost members' is not a standard scientific term used to describe these demographic processes.

Multiple choice

Thomas Malthus

  1. Claimed people are attracted to larger cities when migrating

  2. Claimed all countries go through the demographic transition

  3. Claimed that population growth stimulates food production

  4. Claimed that poulation is growing faster than food
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Thomas Malthus is famous for his theory that population growth, if unchecked, would grow geometrically while food production would grow only arithmetically, leading to famine.

Multiple choice

What is an effect of China's population policy?

  1. Women are having fewer children.

  2. Families are getting larger.

  3. Young people outnumber old people.

  4. China has more workers.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

China's long-standing one-child policy was specifically designed to curb population growth, which successfully resulted in a lower fertility rate among women.

Multiple choice

A cow with high lactation persistence is important the economy. Lactation persistency is:

  1. Cows Ability to maintain production under diff climate

  2. Cows ability to milk for 500 or more days

  3. Cows production this month divided by last month X 100

  4. Tendency for a cow to milk for more than 30 minutes/milking
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lactation persistency is defined as the ability of a cow to maintain its milk production level over time, often calculated as the ratio of current month's production to the previous month's production.

Multiple choice

Which is not a reason for the population increasing rapidly?

  1. More medicines being developed

  2. Food being grown on a larger scale

  3. Increase in the amount of transport being used

  4. Living conditions improving
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

While transport is essential for modern life, it is not a direct biological or social driver of population growth in the same way that improved medicine, food security, and living conditions are.

Multiple choice biology evolution of life darwinism or theories of natural selection darwin's theory of evolution theories of evolution

Darwin was influenced by Malthus who in 1798, wrote that human population increases.............
Whereas their resources increases..............

  1. at 0 percent rate, at 0 percent rate

  2. exponentially, arithmetically

  3. exponentially, geometrically

  4. arithmetically, geometrically
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • The human population increases exponentially when the resources are unlimited according to Darwin.
  • Unlimited resources are the ones that increases arithmetically.
So, the correct answer is 'Exponentially, Arithmetically'

Multiple choice biology how do organisms reproduce? different modes of reproduction sexual and asexual reproduction lifespan, reproduction and variation

Which one of the following is correct?

  1. Reproduction is linked to stability of population of a species.

  2. Reproduction is linked to instability of a population.

  3. Reproduction is linked to instability of a species.

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

During the process of reproduction, the DNA is passed from one generation to another. This replication takes place with little or no errors. There is consistency which leads to stability of reproduction. Also, reproduction helps in replacing aging population with new population and thus ensures the survival of the species. In the absence of reproduction, one particular species will disappear with time.
Thus, the correct answer is the option (A).

Multiple choice economics constraints in economic development of rajasthan programmes for poverty eradication poverty : challenge facing india poverty as a challenge

Demographic dividend refers to a phenomenon in which _____________.

  1. life expectancy improves and normally people begin to live longer life

  2. the share of elderly persons in total population rises

  3. the proportion of working age population rises and dominates the age-composition.

  4. the proportion of children in total population rises.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When the workforce population that ranges from 19-60 years rises in a country in comparison to other age composition it creates an advanced balance in the country's demographics as the production increases due to more contribution of the population. Such situations are known as demographic dividend.

Multiple choice commercial applications i love gujarat flora and fauna in forest ecosystem threatened species need of conservation

The population limited to a particular geographic area is called as.

  1. pandemic

  2. endemic

  3. alien

  4. natural
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A plant or animal, native and restricted to a certain place is referred to as endemic. Endemism is the ecological state of a species being unique to a defined geographic location, such as an island, nation, country or other defined zone, or habitat type; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. Few examples are: The orange-breasted sunbird is exclusively found in the fynbos vegetation zone of southwestern South Africa. The glacier bear is found only in limited places in Southeast Alaska.
So, the correct option is 'Endemic'.
Multiple choice economics indian economy on the eve of independence demographic condition and infrastructure development experience (1947-90) population and human resource development

The theory which explains the relation between fertility and mortality is known as ________.

  1. Malthusian Theory of Population

  2. Optimum Theory of Population

  3. Theory of Demographic Transition

  4. Biological Theory of population
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Theory of Demographic Transition is a theory that throws light on changes in birth rate and death rate and consequently on the growth rate of population. Along with the economic development, tendencies of birth-rate and death rate are different. Because of it, the growth rate of population is also different.

Multiple choice economics indian economy on the eve of independence demographic condition and infrastructure development experience (1947-90) population and human resource development

When did India go through its second demographic transition?

  1. After 1920

  2. Before 1920

  3. 1920

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

The process of demographic transition in India is said to have set in sometime in the late 1920s and early 1930s when death rates started declining. 

Multiple choice economics indian economy on the eve of independence demographic condition and infrastructure development experience (1947-90) population and human resource development

When did India go through its first demographic transition?

  1. After 1920

  2. Before 1920

  3. 1920

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

Prior to 1920, India’s population was in the first stage with very high birth and high death rates. The death rate fluctuated from year to year, and as a consequence, the size of population remained almost stationary. 

Multiple choice economics indian economy on the eve of independence demographic condition and infrastructure development experience (1947-90) population and human resource development

What is mortality rate?

  1. Unit of deaths per thousand individuals per year

  2. Unit of deaths per hundred individuals per year

  3. Unit of deaths per ten thousand individuals per year

  4. Unit of deaths per ten individuals per year
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 Mortality rate is the total number of deaths from a particular cause in 1 year divided by the number of people alive within the population at mid year.  It is usually expressed in units of deaths per 1,000 per year or it could be described as percent dead in a specific period of time.

Multiple choice economics indian economy on the eve of independence demographic condition and infrastructure development experience (1947-90) population and human resource development

What is life expectancy?

  1. The approximate age of a number individuals

  2. The approximate number of death of a number individuals

  3. The approximate age of death of a number of individuals

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

Life expectancy is a statistical measure of the average time an organism is expected to live, based on the year of its birth, its current age and other demographic factors including gender. The most commonly used measure is life expectancy at birth (LEB), which can be defined in two ways.