In: Biology
I can not write the whole thesis but gives you some valuable information.
Evolution of life
Before 3,900 millions year ago a primitive form of life is evolve on earth. Scientist have conflict on evolution of life. There are many hypothesis regarding evolution of life. Life was evolve 3.5 billions year ago (as per the oldest fossile data). However there was also conflict whether it may came from other planet or originated on earth. There are many theories around the world but most convincing theory is of evolution from most primitive organism. As initially earth do not have free oxygen. But it was released by bacteria called as cyenobacteria which release oxygen during metabolism. However this primitive bacteria is evolve in deep ocean or on the surface of planet, is still unclear. Primitively earths atmosphere contains inorganic molecules like methane, ammonia and water. However some chemical reaction might leads to development of organic compound. In 1953, miller experimented on inorganic molecules and reduced mixture of gases (methane, ammonia and hydrogen) into monomers of amino acids. interstingly other scientist also developed models of evolution. Darwin suggested theory of evolution in 1871, “ life might begins in small pond with all short of ammonia and phosphoric salt in the presence of light, heat and electricity organic molecules are generated.
It is still unclear how life evolve, we have to rely on model suggested by scientist. Life is a most complex form. From primitive cell to prokaryotes and from prokaryotic to eukaryotic cell with chloroplast and to animal cell, continuous changes in the form of life makes it more adaptable on earth.
Evolution of culture and society
“culture is a complex mixture of knowledge, belief, morals, arts, low and habitual acquired by society.” Whereas society is a small group of individual who are belongs to the same culture. When the humans are evolved they were lives independently on earth. Wild animals were always remain a threat from humans. Additionally they need meat for their survival. Hence as time passes they become unite for food, hunt and protection and created society. Somewhere in Africa in primitive time these small societies were developed in cultures. They had their own rituals, laws and belief. However clear theory is still not proposed hoe culture is originated.