Population

Estimated time: 3 minutes

Maharashtra State Board: Class 12

Key Points: Population

A population is a group of individuals living in a specific area that shares resources, competes, and can interbreed.
Population attributes include size (number of individuals) and density (number of individuals per unit area), as well as natality, mortality, and age structure.
Natality (birth rate) is the number of births in a population; it can be crude (per 1000 individuals) or specific (based on age or condition). Absolute natality is higher than realised natality.
Mortality (death rate) is the number of deaths per population; it is usually measured per 1000 individuals per year. Absolute mortality is lower than realised mortality.
Sex ratio is the proportion of males to females in a population, and a 1:1 ratio is generally considered stable.

Distinguish between Natality and Mortality.

With the help of suitable diagrams, explain how the age structures determine the trend of population.

In human development index, TN is ranked

Identify the appropriate term for the number of births under ideal conditions:

Describe steady population with the help of a pyramid.

Match the following:

Column A		Column B
(i)	Organism	(a)	Large unit with specific climatic zone
(ii)	Population	(b)	Different species in particular area
(iii)	Community	(c)	Same species in a geographical area
(iv)	Biome	(d)	Basic unit of ecological hierarchy

In sex ratio, Tamil Nadu ranks

Which Union Territory has the highest sex ratio?