NEET BIOLOGY

Detailed explanation-1: -also called age distribution, describes the relative numbers of individuals at each age within a population, they help to predict how the population will change in the future.

Detailed explanation-2: -An age structure diagram, or population pyramid, shows the distribution of age and sex in a population. The y-axis of the diagram shows age groups from birth to old age. The x-axis shows the population percentage.

Detailed explanation-3: -An age-structure diagram provides a snapshot of the current population and can represent information about the past and give potential clues about future problems. When you are interpreting age-structure diagrams, it is important to compare the width of the base to the rest of the population.

Detailed explanation-4: -The age structure of a population refers to the proportionate numbers of people in different age categories in a given population for a defined time. It is a natural characteristic of a population in a country or a region. The age structure is closely related to the birth rate, death rate and migration of a population.

Detailed explanation-5: -The median age provides an important single indicator of the age distribution of a population. It provides the age ‘midpoint’ of a population; there are the same number of people who are older than the median age as there are younger than it. On the map, we see the median age in all countries in the world.