primitive life on earth

Earth is the only planet in our solar system, which is surrounded by oxygen, the life giving gas. It is the only planet to have large quantities of water. Earth's atmosphere contains oxygen, nitrogen, carbon dioxide and water vapour. Earth Earth is ..

Summary - Earth is said to have been formed about4.8 billion years ago. Earliest earth was a hot revolving ball of gas. The formation of first cells in planet earth is explained by the theory of chemical evolution proposed by Oparin and Haldane, independently. Accordin..

. Over the earth's crust is a layer of atmosphere. Right from the day of formation of earth, its crust has been constantly broken and then reorganized to form new continents and oceans. It is thisthin and solidified crust of earth, which supports all life. Th..

Origin of Life - Philosophers and scientists from time immemorial have attempted to explain how and where life originated on this planet earth. Today, earth is the only planet where life exists. However, when the earth was formed about 4.8..

Philosophers and scientists from time immemorial have attempted to explain how and where life originated on this planet earth. Today, earth is the only planet where life exists. However, when the earth was formed about 4.8 billion years ago, there w..

. The planet we live on is not just a ball of inert material. During the past ages, dramatic changes have taken place inside the earth. Without these changes, life could never have originated on the earth. And changes are still going on today, like the occurrence of ea..

Several attempts have been made from time to time to explain the origin of life on earth. As a result, there are several theories which offer their own explanation on the possible mechanism of origin of life. Following are some of th..

Several attempts have been made from time to time to explain the origin of life on earth. As a result, there are several theories which offer their own explanation on the possible mechanism of origin of life..

The earth when it was formed about 4.8 billion years ago, was a hot revolving ball of gas consisting of atoms of various elements. Heavy elements such as iron and nickel were found in the center while comparatively lighter ones like those of aluminium and silicon formed the middle layer. ..

Biology - The study of Life - Biology is a branch of science, which deals with the study of life. It is concerned with the study of living organisms, which are immeasurably diverse and complex than the non-living matter. Hence, biology is also described as life science..