Natural Selection

December 1, 2003

BSC1005 Fall


Charles Darwin is one of the most world scientists in the world. The reason why is his Natural selection theory. His theory basically states that the only real difference between mans existence, and animal/plant life’s, is the size of our brains. Our brains give us the intelligence to actually remember and try to look into the future which makes us the most dominant species on this planet.


In the “Descent of Man,” selection Darwin asserts that it is confidently been asserted that man’s origin can never be known. Ignorance is easier to come by than knowledge. All the bones in man’s skeleton can be compared with corresponding bones in a monkey, bat, or seal. The only real difference is the size of the brain.


Darwin explains a test with monkeys and how they will get drunk off of alcohol and resemble humans hung over in the morning. The monkeys are aware of the taste of the alcohol and refuse to drink it after they have been intoxicated by it. It is very interesting to know that this selected piece really deals with the avenues of modern day comparisons with animals. From eyebrow expressions to hand gestures. We all represent some type of evolved animal. We are the highest on the food chain, but that does not take away the characteristics we have picked up from other successful species. The sense of smell for instance is the highest importance to the greater number of mammals. They warn certain animals of dangers in terms of prey and to others such as carnivores or predators they Word Count: 209

give the hunters’ insight to how close prey is and also what kind of prey it is. I personally feel that Darwin’s theory of evolution is a valid claim. It is only a theory though and it will be a very long time before any one can actually calculate and elaborate on the actual evolution of man. The points made in the comparison of human and animal are hard to deny. The similarities between humans and other animals are clearly evident with the observations made in Darwin’s writing.

The race between predator and prey is a driving force in evolution. In natural selection man has become the most powerful and dominant animal that has ever appeared on this earth. The use of our intellect allowed man to overcome the obstacles that would have annihilated the human race millions of years ago through the predators that walked the earth during the beginning of mans evolution. In the process of natural selection, individuals in a population who are well-adapted to a particular set of environmental conditions have an advantage over those who are not so well adapted. The advantage comes in the form of survival and reproductive success. For example, those individuals who are better able to find and use a food resource will, on average, live longer and produce more offspring than those who are less successful at finding food. Inherited traits that increase individuals’ fitness are then passed to their offspring, thus giving the offspring the same advantages. This theory in essence places a greater emphasis on the similarities between humans and the lower animals. The more adaptation involved within the species to live on in this existence proves that we all can and probably come from the same or similar micro organisms. We often see certain species fall off of the face of the earth and we can always figure why they did not survive.

The Snout is an unspecialized animal. The reason for its evolution was to move forward in the evolutionary chain of events. The snout possessed some type of evolutionary lung that let it breathe in the air rather than a limited air supply in the water. The key to any carbon based life is the need for oxygen. The extra steps that the snout took to breathe in clean air rather than filter the oxygen out with its gills was a great step in evolution. I believe this selection more generally invokes the thought of the evolution of vertebrates evolution out of the water and onto the earth. During the time of the snout, the waters of the earth started to reseed and land began to tower over the water. Certain species