Question

The percent ratio of natality over mortality is known as
A) Vital index
B) Population density
C) Total count of individuals
D) Fertility rate

Answer 1

Hint: The concept of vital index is defined as the ratio of the counts of births to deaths spread across a population for a given period of time.

Complete Answer:
A) Option a: The percent ratio of natality over mortality is known as the vital index.
Natality is defined as the scientific term for stating the birth rate across a population. It goes hand-in-hand with the mortality rate for calculating the dynamics of the population.

There are two basic classifications of the natality –
(i) Absolute natality: Absolute natality refers to the total counts of births under a given set of conditions.
(ii) Realized natality: Realized natality refers to the total counts of births when the environmental stressors come into play.
(iii) Mortality: Mortality rate or the death rate across a population is defined as the total count of deaths within that defined population. This concept is typically expressed according to the units of deaths per thousand individuals per annum. Therefore, this is the correct option.

B) Option b: Population density can be defined as the number of people living per unit area. Therefore, this is the incorrect option.

C) Option c: Total count of individuals means counting every individual present in the population. Therefore, this is the incorrect option.

D) Option d: Fertility rate is used to determine the average number of children per woman. Therefore, this is the incorrect option.

Thus, the correct option is a) vital index.

Note: The advantage of calculating vital index is,
- It is an indicator of a country’s health.
- The vital rate helps in implementing funding policies, funding for research, etc.