Humans & others mammals Essay Example | Topics and Well Written Essays - 500 words

Humans & others mammals - Essay Example Animals like the chimpanzees, apes and bonobos are good examples which through their anatomy and behaviors, prove that evolution is real. The organization of internal organs in the African apes and the human beings is similar. The bone structure is similar and they only differ in shape and size. Human beings however lack tails and this depicts that at one point the humans were analogous to the African apes but they have evolved over time. All mammals are sexually dimorphic in that males are larger than females by about 5-10% (Barton 79). This shows humans are similar to other mammals and are only superior because they have evolved over time. Evolution principles show that body features develop based on habitual bipedalism. The hands of humans are shorter than those of apes. This is because they locomote more using their hands rather than legs. Similarly the legs of human beings are longer than those of apes. The human pelvis and the spinal column are adapted in such a way that the humans remain erect and offer more stability for waking and running. This adaptation is believed to have been achieved due to the competition between humans and other mammals and is evidence that evolution took place. Scientists have proved that the shape of the brain in apes and in humans is similar. However, they differ in size. This increase in the size of the brain proves that evolution has taken place. Human females reach the menopause stage at one point in life. However, other mammals like chimpanzees, apes and gorillas do not become sterile at any stage in life. The Scientific explanation of this difference is based on human selection t hat is a factor that proves evolution (Barton 211). Male Bonobos protect the female bonobos. This characteristic is also present in other mammals such as apes. Human beings also have the same character of males protecting the females. This similarity shows a connection in the origin of humans and apes.