Questions

A sponge has many holes but it absorbs water and can hold them in it.

An operating system is a program that acts as an intermediary between the user and the computer hardware. The purpose of an OS is to provide a convenient environment in which user can execute programs in a convenient and efficient manner. It is a resource allocator responsible for allocating system resources and a control program which controls the operation of the computer hardware.

The American Civil War (1863)

Inhaling of oxygen and releasing of carbon dioxide to make our living is the process called as respiration. We know that, air is a mixture several gases like 78% of nitrogen, 21% of oxygen and several other gases with watervapour.

Hence, Oxygen is essential for respiration process.

PM inaugurates Sikkim's first airport, the Pakyong airport in Sikkim is located around 60 km from the India-China border in the village Pakyong near Gangtok the Sikkim's capital city.

Photosynthesis is the process that converts solar energy into chemical energy. During the stage of light-dependent reactions involving photosystems I and II in photosynthesis, O2 produced.

An enzyme speeds up a reaction by lowering the activation energy which is done by catalysts to increase the rate.