Evolution is the changing composition of the population that happens naturally (or by humans) continuously. The change may occurs only some part which as a result, due to the reaction of the organism to adapt to the environment. When the process occurred there is no return to be the same anymore but keep evolving.
Evolution Theory
A concept that has been influenced by the theory of biological evolution by, Charles Darwin , which says that social change is a process that changes in stages, respectively from one stage to the next step. In the state that more developing that previous stage. Change from a society that is simple to be more complex forms. And the progress continues until it develops to be a perfect society.
Natural Selection
Natural selection is the basic mechanism of evolution with other mechanisms. Natural Selection make the population that fits for the environment to live and breed population in the next generation. But for people who do not fit the environment, it will be discarded and reduced which make the livings that were selected evolve by adapting themselves physically behavior and subsistence to be able to live with the environment that they're living in.
Adaptation refers to the appearance and / or behavior, which is controlled by the genes that make it more likely to inherit genes to the next generation (or fitness) .Adaptation may occur to the structure. Processes of structure and / or behavior of the organism the effect of the adjustment made to increase the number of population and live in a natural environment.
Fessler 2006
Procedure
- Tested whether there were patterns in disgust responses by an online survey
- Participants will be asked to rank the digest level of 20 images
Result
- The disgust reaction was strongest for images which threatened the immune system.
- Disgust also decreased with age and women had higher disgust reactions than men.
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