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Tuesday, December 20

  1. msg "Exam Question 4" message posted "Exam Question 4" the term "missing links" demonstrates poor understanding of evolution. because sometimes …
    "Exam Question 4"
    the term "missing links" demonstrates poor understanding of evolution. because sometimes the link doesnt have to be seen it could be such a gradual change that in the fossil record it would be barely noticable or exactly the opposite the change could have had a split that is hard to detect. but missing link still isnt the proper term. the words "unknown conversion" is definetly better than missing link because its not missing it just isnt clearly evident.
    10:45 am
  2. msg "Exam Question 3" message posted "Exam Question 3" an example of coevolution is Hermit Hummingbirds and the curved flowers of the genus heliconia. the…
    "Exam Question 3"
    an example of coevolution is Hermit Hummingbirds and the curved flowers of the genus heliconia. the flower developed a type color change in their fleshy fruit covered seeds that are high in nutrients to attract birds that will disperse their digestion proof seeds. in response to that the hermit hummingbirds can still get the nutrients without eating the seeds and the regurgitate the seed and allow the plant to spread.
    10:39 am
  3. msg "Exam Question 2" message posted "Exam Question 2" Artificial selection and natural selection both produce viable offspring but with different purpose…
    "Exam Question 2"
    Artificial selection and natural selection both produce viable offspring but with different purposes and processes. Both create and organism that will better fit their environment. Natural selection works to produce an organism that will survive in their environment. Artificial selection works to create an animal for a specific purpose like the nicest breed of horse or the best show dog. Natural selection works through the environment and food sources mutations and the gene pool where artificial selection uses the gene pool to create an organism suited for a specific thing not to be the best organism for a wild habitat.
    6:07 am
  4. msg "Exam Question 1" message posted "Exam Question 1" In the first model everything is leading to the origin of species and population stability. The mod…
    "Exam Question 1"
    In the first model everything is leading to the origin of species and population stability. The model is a little confusing at first. Mutation and heredity lead to variation and variation leads to competition and they both lead to differential survival. Limited resources have two paths it affects biotic potential and over reproduction which leads to competition also. The other path leads to limited survival and change in population. Everything then ultimately leads to origin of species and population stability. Which works with what we learned in class it just takes a while to see it because the map doesn’t flow right.
    The second model shows that everything is connected and that different aspects of evolution all work together. Variation and competition along with reproduction leads to changes in population which leads to the evolution of new species. Limited resources and biotic potential lead to over reproduction and variation and mutation lead back to limited resources and competition. Everything is connected but it leads to the origin of species while working interconnected.
    5:58 am

Monday, December 19

  1. msg "Exam Question 2" message posted "Exam Question 2" Natural selection is the evolution of an organism in response to ecologic factors and competition. …
    "Exam Question 2"
    Natural selection is the evolution of an organism in response to ecologic factors and competition. Artificial selection is the evolution of an organism in response to desirability or usefulness to humans. If i had to change the models to reflect artificial selection, i would delete factors such as "overproduction" and "Limited resources" and replace most of those environmental factors with factors such as "trait desirability" and selective breeding. The genetic factors of those charts would stay basically the same. It would be difficult to decide what factors to replace, however, because both natural and artificial selection are changes in response to an environment.
    6:46 pm
  2. msg "Exam Question 1" message posted "Exam Question 1" Model 1: This model may initially look very jumbled, however I believe it makes some important po…
    "Exam Question 1"
    Model 1:
    This model may initially look very jumbled, however I believe it makes some important points. Environmental change causes a continuous cycle, which is, at one point, affected by genetic change. Variation in a population plus over reproduction is a key cause of differential survival, and thus evolution and I am glad this is displayed in the model. This model overall shows two different cycles that combine and create the evolution of a species.

    Model 2:
    This model may look more concise than the first one, but i believe that it is actually more confusing. For example, I don't understand how limited resources causes overproduction. I would argue that the opposite is true. I do like how this model displays two key points and how they are relative to each other in terms of other factors. Similar to the first model, the origin of species is the one - way destination for this model.
    6:32 pm
  3. msg "Exam Question 3" message posted "Exam Question 3" An example of coevolution would be with the Australian Broadheaded snake and the velvet geckos. The…
    "Exam Question 3"
    An example of coevolution would be with the Australian Broadheaded snake and the velvet geckos. These snakes are predetors to the gecko. These geckos have evolved to be able to detect the scent of the Australian Broadheaded and then flee from danger. In return the snakes have evolved in a way that makes them go sedentary for long periods of time in order to reduce the extent of contact the gecko has to familiarize itself with the scent. This gives the snake the ability to attack the gecko without its presence pre-known to the gecko. Because of an advantage in trait the gecko were able to evolve as a population to have the ability to detect the scent, and in turn the snake evolved because populations that were able to minimize contact survived. These surviving snake populations reproduced to expand to where other population that did not change had died and left a unfilled niche.
    5:08 pm
  4. msg "Exam Question 4" message posted "Exam Question 4" The idea of the “missing link” is a misunderstanding of evolution, fossilization, and the fossil re…
    "Exam Question 4"
    The idea of the “missing link” is a misunderstanding of evolution, fossilization, and the fossil record. Evolution is a continuing process that is formatted by the change in the environment, this making it not a jump between species that can be filled by a single link. Evolution is rather a growth in differences between individual populations. This idea is a misunderstanding in fossilization and the fossil record because the idea implies more of a jump between species that does not happen. Since our fossil records are so limited we are unable to show a good process of change between species. A better terminology would be “missing processes” because evolution is an extended process of changes in the organisms within a population.
    4:53 pm
  5. msg "Exam Question 2" message posted "Exam Question 2" Natural Selection and artificial selection both include the selective process by individual genes t…
    "Exam Question 2"
    Natural Selection and artificial selection both include the selective process by individual genes that correspond with their trait are given to the organism. In the wild the selective process is defined by what will help the organism survive with the environment. When a specific trait hinders the organism to reproduce then its specific trait is lowered if terminated from/within the gene pool, however this must happen on a larger scale than just the individual. This is the same idea that creates the selective process in artificial selection. When a trait is disliked by the individual they will stop the trait from being able to reproduce, and thus make the offspring carriers of the wanted gene/ trait. Within both process the selective process is defined by the preferred set of traits that allow the organism to reproduce.
    4:35 pm
  6. msg "Exam Question 4" message posted "Exam Question 4" When there is a “missing link” there is a whole in your data, and in understanding the processes of…
    "Exam Question 4"
    When there is a “missing link” there is a whole in your data, and in understanding the processes of evolution, fossilization, and the fossil record, there is really is no room for mistakes, or to give room for skepticals to come in and refute the position for which you argue (in this case for evolution). It shows an error in the understanding of natural selection and evolution because it refers to it as a kind of timeline of events that occurred and with one missing link; it is easy to see the whole idea as erroneous. A better word for a “missing link” in ecology is a “misunderstood concept” a concept that is hard for us to understand how exactly it came about and how it occurred. There are no “missing links” there are only concepts that we cannot grasp in the process of evolution, fossilization, and the fossil record. “Missing link” shows a very vague understanding of these different concepts.
    10:19 am

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