Friday, April 7, 2017

Creationist Ideas on Evolution

Natural selection is one of the driving forces behind evolution, but it is not the only force influencing the evolution of species. Mutation, migration, and genetic drift also play crucial roles. Darwin’s theory of natural selection can be confusing and it is often misunderstood, especially by creationists. Many creationists believe that natural selection is a God-ordained process that allows species to survive post-flood. It is true that natural selection can help organisms with certain heritable traits to survive and reproduce more successfully than species who lack certain traits. However, the term natural selection should not be confused with evolution because they are not the same thing. In order for natural selection to occur, certain criteria must be met. For example, there must be genetic variation among traits, selection pressures causing there to be differences in reproductive success among species with different traits, and the ability of traits to be passed on from generation to generation. One of the arguments in this article is that natural selection cannot lead to evolution because it is nondirectional when selection pressures are removed. While this idea is true, when there are no selection pressures the traits that get passed onto the next generation are random, it is important to remember that natural selection does not always lead to the evolution of new species. Therefore, natural selection does not have to be unidirectional to help drive evolution. Another argument is that speciation has never been observed to form an organism of a different kind, such as a dog species producing a cat. However, evolution does not work this way. Instead, evolution is the gradual change in a species genetic makeup that leads to the evolution of new species. An organism like a dog would not suddenly evolve into a cat. Instead, genetic mutations accumulating over many generations would gradually lead to changes in species and the evolution of new species. Many of these species being links, or common ancestors, in a phylogenetic tree.  

Posted by: Katie Kossack

Source: https://answersingenesis.org/natural-selection/is-natural-selection-the-same-thing-as-evolution/

6 comments:

  1. You've made very good light of several topics it seems people often confuse. For one, I like that you mentioned that natural selection does not lead to evolution but still may play a role in it. It cannot lead to a new species because it is nondirctional when selection pressures are removed.

    I also like how you've mentioned that a dog does not just evolve into a cat. A phylogenetic tree may be used to link two species together, but the history is often very lengthy. Phylogenetic trees are very cool in what they show us! Evolution is a gradual thing and it often seems that it is forgotten.

    Posted by Anna Potorski

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    1. I think the concept of evolution can be confusing to a lot of people, especially if they do not have a strong science background. I think one of the major flaws in the article was that the author was trying to argue that organisms like insects and bacteria evolve resistance to certain pesticides and drugs but a dog has never evolved into a cat. While it's true that insects and bacteria can become resistant to certain pesticides and drugs, a species like a dog would never just evolve into a cat. A change like that would be much more gradual.

      Posted by: Katie Kossack

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  2. It is always interesting to see Creationists ideas when it comes to evolution. Evolution is still a very controversial topic and many do not believe in it. It is important for people to become more educated on evolution so misconceptions and doubts can be eliminated.

    Posted by Leah DeLorenzo

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    Replies
    1. I agree that there are a lot of people who don't believe in evolution. However, I feel like a lot of the people who don't believe in it don't fully understand the concept of it. I also think it's hard to make a case against something you don't fully understand so I agree that becoming more educated would help eliminate a lot of the doubts and misconceptions surrounding the theory of evolution.


      Posted by: Katie Kossack

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