Population Growth

Q.

What is natality?

Q.

What are the 4 stages of population growth?

Q. If birth rate is 100, death rate is 10 and the number of individuals in the population group is 1000, then what will be the percentage of natural growth rate?

1. 0.9%
2. 90%
3. 9.0%
4. 0.09%

Q. If 4 individuals in a laboratory population of 40 fruitflies died during a specific time (a week) interval, the death rate in the population per week is

1. $1$
2. $0.1$
3. $10$
4. $400$

Q.

Population growth curve is sigmoid if the growth pattern is

1. Accretionary

2. Exponential

3. Logistic

4. Geometric

Q.

Human population follows the

1. Z-shaped growth curve

2. S-shaped growth curve

3. All of the these

4. J-shaped growth curve

Q. The maximum growth rate occurs in

1. Senescent phase
2. Lag phase
3. Exponential phase
4. Stationary phase

Q.

The age structure of a population influences population growth because

1. Different age groups have different reproductive capabilities

2. Younger females have more offspring than older ones

3. Shorter generation time results in slower population growth

4. More the number of immature individuals, slower is the population growth

Q. There are two basic population growth models - exponential and logistic growth.

1. True
2. False

Q.

In India, the population is heavily weighted towards the younger age groups as a result of

1. long lifespan and a high birth rate

2. short lifespan and a high birth rate

3. short lifespan and low birth rate

4. long lifespan and low birth rate

Q. Statement 1: Birth rate is the ratio of the number of individuals born in a population in a given period of time to the initial total population.

Statement 2: Population density is designated as N and needs necessarily to be measured in numbers only.

1. Statement 1 is correct while statement 2 is incorrect
2. Both the statements are correct
3. Statement 2 is correct while statement 1 is incorrect
4. Both the statements are incorrect

Q. If birth rate is 100, death rate is 10 and the number of individuals in the population group is 1000, then what will be the percentage of natural growth rate?

1. 0.09%
2. 9.0%
3. 0.9%
4. 90%

Q. Zero growth means

1. Natality balance mortality
2. Natality is more than mortality
3. Natality is less than mortality
4. Natality is zero.

Q. If natality is just double to the mortality and the number of individuals in a group of population is 1000. Calculate the percentage of growth rate (natural). Assume death rate 60.

1. 0.05%
2. 50%
3. 5%
4. Between 5-10%

Q. Study the following statements (A - D) related to the logistic growth model and select the wrong statements.

A. A population growing in a habitat with limited resources initially shows a lag phase.

B. Carrying capacity of a population is represented by ‘r’.

C. Logistic growth model is not a realistic growth model.

D. Logistic growth model is represented by a sigmoid curve.

Q. In which of the following options, both the processes in the pair have a positive effect on population density?

1. Natality and emigration
2. Mortality and immigration
3. Mortality and emigration
4. Natality and immigration

Q.

If the growth rate is two percent, in how many years the population will be doubled?

Q. Population growth rate can be best described as

1. Rate at which a population grows
2. Rate at which a population grows in a set geographical location
3. Rate at which individuals are added to the population per capita
4. Rate at which individuals grow and attain maturity in a population

Q.

The measure of the maximum population that can be sustained by an ecosystem is

1. carrying capacity

2. natality

3. biotic potential

4. ultimate level

Q.

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

Q. If the town with a population of 500 individuals sees an increase by 80 individuals and has 20 individuals dying, what would be the growth rate of the population?

1. 0.16
2. 0.5
3. 0.12
4. 0.008

Q. 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. Mortality and immigration

Q. Zero growth means

1. Natality balance mortality
2. Natality is more than mortality
3. Natality is less than mortality
4. Natality is zero.

Q. What is an ecosystem service? List any four important ecosystem services provided by the natural ecosystems. Are you in favour or against levying a charge on the service provided by the ecosystem?

Q.

Do you think that reproductive health in our country has improved in the past 50 years? If yes, mention some such areas of improvement.

Q. In 2015, for each of the 14 million people present in a country, if 0.028 are born and 0.008 die during a year. Calculate the number of people at the end of 2015:

1. 25 millions
2. 17 millions
3. 20 millions
4. 18 millions

Q. How does biology help in control over population?

1. By use of biofertilizers
2. Educating use of contraceptions
3. Killing of female fetus
4. All of the above

Q. Zero growth means :

1. Natality is more than mortality
2. Natality balances mortality
3. Natality is less than mortality
4. Natality is zero

Q.

In India, the population is heavily weighted towards the younger age groups as a result of

1. long lifespan and a high birth rate

2. short lifespan and a high birth rate

3. short lifespan and low birth rate

4. long lifespan and low birth rate

Q. In a population, unrestricted reproductive capacity is known as

1. Carrying capacity
2. Natality
3. Biotic potential
4. Birth rate