Questions

• International Workers' Day, also known as Labour Day in some countries, is a celebration of labourers and the working classes that is promoted by the international labour movement, socialists, communists or anarchists. 
• It occurs every year on May Day which is May 1st. It is the day to pay tribute to the Labourers. Without them nothing will complete. 
• In India, the first Labour Day, or May Day, was celebrated in 1923 in Chennai.

The river which starts flowing from Himalayas on the North to southwards to empty in the Arabian sea is Indus River.

Cosmology is the scientific study of the large scale properties of the universe as a whole. It endeavors to use the scientific method to understand the origin, evolution and ultimate fate of the entire Universe.

Depending on the outcome of the observations, the theories will need to be abandoned, revised or extended to accommodate the data. The prevailing theory about the origin and evolution of our Universe is the so-called Big Bang theory.

Gene flow means migration of genes from one to another. This gene flow is caused by individuals moving into population.

Microprocessor contain ROM chip beacause it contain instructions to execute data. It contain the monitor program which not only include execution instruction but also interfacing program

As there is no atmosphere surrounding the moon, the second from any band that is played there cannot travel outwards there is no material medium surrounding if for its propagation.