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 biology plant growth growth rates and conditions for growth population ecology growth and development

Maximum of growth occurs in

  1. Exponential phase

  2. Decline phase

  3. Stationary phase

  4. Lag phase
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Bacterial growth is divided into four phases, namely lag phase, exponential phase, stationary phase and decline phase. In lag phase, there is very little or no bacterial growth. In this phase, bacteria are adjusting to environment and synthesizing biochemicals and nutrients. In exponential phase, the number of bacterial cells doubles at an exponential rate. The maximum growth occurs in this phase. In stationary phase, the rate of cell death is equal to the rate of cell division. In decline phase, there is decrease in the bacterial population due to lack of nutrients and high toxin concentration
So, the correct answer is 'Exponential phase'
Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

In signoid growth curve, upper asymptote represents period of

  1. Establishment

  2. Negative acceleration

  3. Positive acceleration

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

In a sigmoid growth curve, there are three phases, lag phase, exponential phase and steady state phase. The upper limit of the curve is called as upper asymptote. It represents the period of equilibrium. At this stage, birth rate and death rate are at balance. It is said to be at equilibrium because at this stage, there is equilibrium between biotic potential and environmental resistance.

Thus, the correct answer is option D.

Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

Which of the following is not a feature of a J-shaped growth form of population?

  1. It is found in stable type of population.

  2. Exponential phase is very rapid.

  3. A crash phase occurs at the end of the growth.

  4. Environmental resistance does not operate.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

J-shaped growth curve is a curve on a graph that records the situation in which, in a new environment, the population density of an organism increases rapidly in and exponential or logarithmic form, but then stops abruptly as environmental resistance or some other factor suddenly becomes effective. The actual rate of population change depends on the biotic potential and population size. It may be summarized mathematically as 

                                           dN/dT= rN (with a definite limit on N)
where, N is the number of individuals in the population
t is time
and, r is a constant representing the intrinsic rate of increase (biotic potential) of the organism concerned.
The population grows exponentially, and after attaining the peak value, the population may abruptly crash. This increase in population is continued till large amount of food materials exist in the habitat.
So the correct option is 'it is found in stable type of population'.

Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

 Because of the which of the following reason/s, growth stops completely during the stationary phase?

  1. Lack of nutrients

  2. Saturation of nutrients

  3. Over availability of nutrients

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

The stationary phase is the phase in which the growth of lant generally stops and the plant proceeds towards maturity it may occur due to the lack of nutrients majorly seen in the unfavourable season.

So, the correct option is 'Lack of nutrients'.

Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

Exponential growth is shown during

  1. Lag phase

  2. Log phase

  3. Maturation phase

  4. Senescence phase
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Bacterial growth is divided into four phases, namely lag phase, log phase, stationary phase and death phase. In lag phase, there is very little or no bacterial growth. In this phase, bacteria are adjusting to environment and synthesizing biochemicals and nutrients. In log phase, the number of bacterial cells doubles at an exponential rate. This phase shows maximum or exponential growth. In stationary phase, the rate of cell death is equal to the rate of cell division. In death phase, there is decrease in the bacterial population due to lack of nutrients and high toxin concentration.
Thus, the correct answer is option B.
Multiple choice civics individual and society achieving equality moving towards equality diversity and discrimination

What is Net-Reproduction rate?

  1. Number of deaths of children below one year of age per 1000 live birth

  2. Birth rate minus death rate

  3. Average age to which a person at the time of his birth is expected to live

  4. The rate at which women are replaced by daughter who will have children.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Net Reproduction Rate (NRR) is a demographic measure representing the average number of daughters that would be born to a woman if she passed through her lifetime conforming to the age-specific fertility and mortality rates of a given year.

Multiple choice geography urbanisation urbanisation and people urbanisation : causes and consequences industrialisation and urbanisation

Consider the following statements:
1. The natural increase in population in urban areas.
2. Migration of people from rural areas to urban areas.
What do the above statements suggesting?

  1. Overpopulation

  2. Urbanisation

  3. Globalisation

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

Natural population increase and rural-to-urban migration are the two primary drivers of the urbanization process.

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

consider the following statements
1. Human resource has quantitative as well as qualitative features.
2. Size of population,growth of population and health care are quantitative features.
3. Birth rate,age structure and sex ratio are qualitative features.

Which of the above statements are correct?

  1. 1 only

  2. 1 and 2 only

  3. 2 and 3 only

  4. 1,2 and 3 only.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Human resource has two parts- quantitative and qualitative. While size of population and growth of population are quantitative part but health care comes under the qualitative part.
Birth rate, age structure and sex ratio come under quantitative part.

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

Consider the following statements-
 
1.The branch of social science that analyses the population,the change in its size,its structural aspects,etc is known as demography.
2.Size of population refers to the total number of people residing in a country at a particular time.

Which of the above statements are wrong? 

  1. 1 only

  2. 2 only

  3. both 1 and 2

  4. neither 1 nor 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Both statements are correct definitions within the field of demography. Therefore, neither statement is wrong.

Multiple choice nutrition and health status introduction to tamil nadu economy tamil nadu economy food security and nutrition economics

Balanced ___________ implies improvement in quality of life of female population.

  1. male ratio

  2. sex ratio

  3. female ratio

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

A balanced sex ratio is a key indicator of social development and gender equality, which directly correlates with an improved quality of life for the female population.

Multiple choice geography population and settlement urbanisation and people urbanisation : causes and consequences industrialisation and urbanisation

In the hierarchical human settlement what does a hamlet mean?

  1. A large town with a population of 20,000 to 100,000.

  2. That which has a tiny population of less than 100 and very few (if any) services, and few buildings

  3. A town which has a population of 1,000 to 20,000

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

According to population size, a hamlet occupies next higher position to the isolated dwellings. A hamlet has a tiny population of less than 100 and very few (if any) services, and few buildings. A hamlet is smaller than village.

Multiple choice political science india's internal challenges internal challenges faced by india discrimination prejudice and discrimination

The index of modernization is _________.

  1. The decrease in the number of cities.

  2. The increase in the number of towns.

  3. The growing population in rural areas.

  4. The stable population in rural areas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Modernization is a way to leave behind the problems of traditionalism. It is a concept of sociology that refers to a process in which society goes through industrialization, urbanization and other social changes that completely transform the lives of individuals. The index of modernization can be judged through the increase in the number of towns. Today rural life is transforming into urban life. Nowadays people are more attracted to the concept of urbanization.

Multiple choice political science our society marginalisation in india understanding marginalisation challenges and solutions

Which of the following are the deciding factors of the quality of population?

  1. Literacy

  2. Sex composition

  3. Occupational structure

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

Deciding factors of the quality of population are all the factors given in the options.

  • Literacy is nothing but the education of the people living in particular area.
  • Sex composition is the distribution of the male and female population in particular area.
  • Occupational structure is the distribution of population based on the occupation of the person. There exists a relation between occupational structure and development.
  • Higher literacy rate, equal ratio of male and female population and increased occupation in the field of secondary and tertiary structure implies the healthy and quality population.