Similarly, as dissection of the frog s body is taught to medical students the human beings have system for system, muscle for muscle nerve for nevre and vessel for vessel a resemblance with the frog. But this does not mean that man and other creatures can be grouped together with a common ancestor. The Encyclopedia Britanica has criticised the idea of having a common ancestor on the basis of structural resemblance. As far as man s resemblance with other creatures is concerned the Holy Qur an says, There is not an animal on earth nor a bird that flies on its wings but they are all communities like you. It is quite easy to understand that man has similarities with other creatures in various body systems although it is at variance with different species, yet man enjoys a unique position.
Today there are one million species of animals and two hundred thousand species of plants.
Scientists also say that todays existing species are just 0.1 percent of the total species that this earth ever witnessed. It means that 99.9 per cent of species have already died out and became extinct. Why is he the only one who communicates with each other with the help of a complete verbal language. Darwin s theory is based on natural selection, which means that the evolutionary process takes place only when there is a need for it. For example giraffes grew long necks as they needed to eat the leaves of tall trees.