Question

Five Mark Questions.
(a) List the different attributes that a population has and not an individual organism.
(b) What is population density? Explain any three different ways the population density can be measured, with the help of an example each.

Answer 1

A population is defined as a group of individuals belonging to same species living together in an area and functioning as a unit.

The different attributes of a population are given below:

1) Birth rate- It is defined as the number of live births per thousand population of individuals per year.

2) Death rate- It is defined as number of deaths per thousand population of individuals per year.

3) Sex ratio- It is defined as number of males or females per thousand individuals.

4) Age distribution- It refers to the number of individuals of different ages in a given population.

5) Population density- It is the number of individuals present per unit area at a given time.

b) Population density is define as the measurement of population per unit area at given time.

The three different ways of measuring population density are:

1) Arithematic density- It is defined as the number of all people that live in a per unit area throughout a country.

2) Physiological density- It is defined as the number of people per unit area of arable land.

3) Agricultural density- It is defined as the population density measured as the number of farmers per unit area of arable land.