The similarities among living organisms indicate that all of them have evolved from some single common ancestor (This is called monophyletic origin). Through the process of gradual modifications, adaptations and natural selection, over a million and a half different species have evolved from a common ancestral form. This process is called evolution or organic evolution. [...]
1. What do you mean by climatic background to human evolution? Ans. Towards the end of the Miocene, between seven to five million years ago, an abrupt drop in global temperature coincided with the formation of the West Antarctic ice sheet, Sea levels fell, the tropical belt shrank residing widespread extinctions of primates throughout Eurasia. [...]
The term Evooution was first coined by the British Philosopher, Herbert Spencer. According to Darwin Evolution is “The descent with modification”. In other words, Evolution is slow process in which the organisms react with the environment to accumulate gradual modification that lead to the formation of new species. As a result the simpler organisms give [...]
