Evolutionof Bipedal Locomotion
1939 words 4 pages
... be considered stable, which helps in providing a more constant social relationships and perhaps closer mother-infant relationships that improve the infants chance of survival, (2) The reduction in injuries to infant because infants no longer were attached to a mother that is continuously mobile and (3) a reduction in the time between each birth by allowing more offspring to be cared for successfully. Thus, the life style introduced by bipedalism, long distance foraging, continuous sexually activity, and their many behaviors probably improved survivorship (Strickberger, 1990). The Evolution of bipedal locomotion was caused by various selection processes and adaptations which occoured over a long period of time. The reason why these changes occoured are not simple, but on examination of the evidence do seem quite clear. The feet of our ancestors were put under different strains and they adapted in such a way that it benefited the species. This enabled them to stand for longer period of times, run faster and basically ensure that they had a better chance of survival. The knee joints also had to adapt, as the animal could no longer rely on using all four limbs to stand. The joints developed in such a way that it was possible to stand up straight, bipedally. The Pelvis was also forced to changed, facilitating a different center of gravity. It also allowed for the different shape of cranium foramen magnum, to be able to pass through the birth canal. Natural selection is also important to take into consideration when talking about the evolution of bipeds. It was because of this selection, that certain characteristics were passed on from one generation to the next. Efficient bipedal movement is a trait that appeared very early, and it is probably the single most important development in the emergence of man.
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