Hominina

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  • Charles Darwin's Three Principles Of Evolution By Natural Selection

    Charles Darwin is very well known for his theories on evolution and most importantly his three principles of evolution by natural selection. Darwin’s first principle is that a variation exists within populations. Some examples of variations include body size, bone structure, tooth size, hair thickness, shape of the rib cage and position of the foramen magnum. In Evolution, Dr. Alice Roberts provides examples of early hominins and how their physical makeups were reconstructed by archeologists in order to determine their different variations. Different physical characteristics or variations can either increase or decrease the fitness of an organism. An organism’s fitness in anthropology does not refer to cardiovascular fitness, but rather to an organism’s ability to reproduce and pass on its genes to its offspring. The second principle of evolution is the fact that variation is passed to offspring through heredity. If variation is favorable or if it increases the fitness of an organism than according to natural selection, that variation will become more common in the generations to follow. In contrast, those organisms that experience variation that has a negative impact on their fitness will not survive long enough to reproduce successfully. Therefore, their offspring and heritable traits will not be reoccurring in the future generations. The idea that different physical characteristics among organisms causes them to produce a varying number of offspring is Darwin’s…

    Words: 1574 - Pages: 7
  • Hominin Species Essay

    Evolutionary Relationships of Hominin Species In the study of human evolution, the timeframe that a specific species appeared and lived is a very important aspect to better understand how modern-day humans developed. The oldest of the species in the chart above is Australopithecus afarensis. Australopithecus afarensis appeared roughly 3.85 - 2.95 million years ago; while it more closely resembled an ape, the evolutionary development into modern humans was beginning. Australopithecus afarensis…

    Words: 983 - Pages: 4
  • Essay On Sahelanthropus

    When looking back on the evolution of man nothing stands out more than the word “bipedalism” this is what kicked us off the ledge to start us on the path of walking upright completely and gave us the dominated figure we all have today. Now let’s take it from the beginning the earliest forms of human beings used to climb tress and would walk on the ground, this use of flexibility allowed early humans to get around in such diverse habitats and also to be able to cope with the many changing…

    Words: 1005 - Pages: 4
  • Advantages And Disadvantages Of Bipedalism

    Bipedalism is something people take for granted. Without conscious thought they put one foot in front of the other and stride forward. While great attention is given to a baby’s first steps, little, if any, attention is given to the advantages of this form of movement. The benefits of walking, running, and standing while using two legs instead of four go unremarked. It is simply natural for humans to travel this way. Humans are not the only animals to use bipedalism, birds and some mammals,…

    Words: 943 - Pages: 4
  • Primates And Hominins Similarities

    The primates that possess characterics like bipedalism, smaller canine size and bigger brain size are hominins. Humans are the modern Hominins and the fossils reveal that several species of hominins are extinct. Homo is a type of Hominin that lived around 1.9 m.y.a and it is the immediate predecessor of Homo sapiens. Paleontologists and archeologists have classify each time they discover new fossils that have primates and or derived characteristics. The two groups of anthropologists are lumpers…

    Words: 1081 - Pages: 5
  • Why Are Humans Bipedal Essay

    There 's many reasons our ancestors had begun walking around on their two legs instead of running on all fours. Evidence was collected during two trips to Guinea in West Africa, because of the trips, there has been one of several leading explanations for why humans became bipedal (an animal using only two legs to walk) millions of years ago. Researchers from Portugal, United States, Japan and England spent multiple weeks watching chimpanzees in their natural habitats to see how they moved about,…

    Words: 1063 - Pages: 5
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