Case Study: The Human Evolution

In this section of Newer Scientist in the heading of Human Evolution we’ll be covering the entire basis on the Human evolution and simplifying it down to an accurate and easier way to understand explanation of the Human Evolution.

I’m going to start this section off with what the term evolution means. There can be different types of definitions for evolution but the one definition, which is necessary for what we are talking about, is ‘Biological evolution’. Biological evolution is defined as many or any genetic changes to a population that is inherited over several generations or over the course of their life span. A lot of these changes may have a small impact or a large impact; they may or may not be noticeable through the course of life. But whatever the change is it will be classed as an evolution of some sort.

Many people will ask “How do we know that these evolutions have changed the population over the course of life or

what if they have been the same as we see them today” Well a way of knowing weather a species has evolved into what it is now, is by looking at the fossils. Fossils will provide lots of information about the organism that used to inhabit the earth in the past. So when the organism dies, the weather usually destroys the body. But on other occasions the body will be covered by mud that will harden over time or it will be incased by ice, which will protect the body of the organism. When scientists come to dig up the fossils of the organism the scientist will compare the organism from the past to the futures organisms and they will identify the Evolutionary changes.

Ill be moving onto three pretty really important key features on the human evolution, we will

walk down a pretty interesting path of a process called, “Natural Selection”. Natural Selection is the gradual process by which heritable biological become

The change

from the Ape to

the Current form of

the Human

mankind.

Source 1

Natural Selection:

Fossil Record:

either more common or less common in the population to function the effect of inherited traits on a completely different reproductive success of the human’s interacting with their environment. A really good example of natural selection is that of the humans and the really similar traits to the apes, even thought that we have lost the mount of body hair that the apes have but we have gained a lot more brain mass and we have become a lot more smarter then the average ape. The reason that our brain mass has increased is because that humans come from a different line of apes, so you have got the apes that we have to day, and then you have the apes that have the evolution to the humans. And our brain mass has grown for the ages of live, from the Stone Age, to the present. As you can see, Natural selection plays a very, very important role in the live of human well pretty much any evolution to date.

Another really important key feature is speciation. Speciation is a rather peculiar part to any evolution. The term of speciation is the

evolutionary process by which reproductively isolated biological populations evolve to become distinct species. There is only two ways for speciation to occur. Phyletic evolution occurs when a population of a species progressively changes over time to become a new species, for example from the apes to the current human form. Branching evolution or divergent evolution is more common; in this case, a population is divided into two or more new populations that are prevented from interbreeding. For example we have the apes to the current human form and we also have the monkeys, apes that has not changed to the form of the humans. Over long Generations, new population to the human race will or may become so different that it will be a lot less fertile offspring’s. That at this point there will become more human species.

The change in human evolution. Source 3

Speciation:

To conclude this amazing case study on the human evolution ill tell you more about it lets go through it together. There has been a big debate on the evolution of the apes and the humans. So this case study ill tell you more about the chimps and humans, cause well all know that we have lots of similarities. We all know that when people get to know each other really well we can spot our friends and family when they are in a crowd even Monkeys can pick a face out of a crowd just as humans can, a study by scientists at the Max Planck Institute for Biological Cybernetics in Tübingen, Germany, found. "From an early age on we are accustomed to the faces of other humans: a long nose, the swing of the lips or the bushy eyebrows. We learn to recognize the small differences which contribute to an individual appearance," said study researcher Christoph Dahl in a statement. Monkeys also can spot the "long noses" in their pals.

So we all have that day after a long day at work or if you have been stressed out, we would all fall in the lap of gluttony and have a stiff drink (but if you’re a kid you probably wont have the stiff drink) to a big gallon of your favourite sweet delicious ice cream. Turns out that is a type of monkey in the world called the rhesus monkey they do the same thing when battling stress. These monkeys naturally form hierarches, including dominant and subordinate females show signs of stress, from excessive body scratching, yawning, self-grooming and pacing. Mark Wilson, a neuroscientist at Yerkes National Primate Research Center of Georgia's Emory University. Say “when we gave them a diet more like the American diet, high in fat and sugar, what happens is the subordinates eat more," Wilson told Live Science in 2008 when the study was published. "It's a comfort food. The dominant monkeys don't eat it in excess like the subordinates."

Bibliography:http://anthro.palomar.edu/primate/prim_8.htm http://humanorigins.si.edu/education/introduction-human-evolution https://en.wikipedia.org/wiki/Human_evolution