When the number of individuals added to the population exceeds the number of individuals lost, there is :

1. Decrease in carrying capacity
2. Exponential population growth
3. Zero population growth
4. Decrease in biotic potential

The symbol of family welfare is :

1. Red circle
2. Green triangle
3. Red square
4. Red inverted triangle

What was directly responsible for the rapid rise of world population in the twentieth century ?

1. Better education and jobs
2. Religious and social customs
3. Better healthcare
4. Increased food production

Which of the following is not a non-conventional source of energy ?

1. Nuclear energy
2. Tidal energy
3. Petroleum energy
4. Wind energy