Evolution
Evolution
When we see such animals as a Husky and Chihuahua, we see a great difference in the two. A Husky is a large, strong dog which amplifies its power, and next to such a minute, yappy thing as a Chihuahua, it’s hard to see that they are the same species. Yet, they are. All dogs are related to each other, ignoring the very vast distinguishable features that each may have. How and why may be two questions that stand strong, but it’s all explained through the theory of evolution. They all evolved from the same animal, a wolf.
But what is evolution? Evolution, by dictionary definition is defined as "The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.". To explain more thoroughly, evolution is organisms forming from simple to more complex beings in a large span of time. Over time, all living things change their DNA. May it be a significant change as getting a domestic house cat from fierce predatorial feline, or an Infinitesimal fur change on a species of mice, even size of a shell that a certain snail carries. All these are evidence of evolution. Evolution is a theory, formulated by Charles Darwin. He called it “decent with modification”. He stated that descendants of an organism will differ from the original species, and expand with genetic variety into different forms. Evolution happens all around us, and with the mechanism of natural selection. Natural selection, or “survival of the fittest” is stating that offspring which are better suited to an environment, possibly through a mutation, will have a larger chance at survival. |
My Opinion On Evolution
I truly believe evolution exists. Its presence is abounded in history and present life. Once all that roamed were archaic cells, which over a large period of time formed into more complex beings. After a long period of time Dinosaurs’ ruled, which then ended abruptly and the small population left evolved. Shrews to mammals, and the rest into reptiles, amphibians etc. Of course all of this is only a theory, yet this theory is largely accepted, and has substantial evidence. Religion does argue with the whole thought of evolution, but evolutionary evidence does overpower the religious aspect. Though evolution isn’t something we can witness in a short span, doesn’t mean it doesn’t happen.
Punctuated Equilibrium Vs. Gradualism
The difference between gradualism and punctuated equilibrium is drastic yet have similar basis. Gradualism takes time, you only see the effect over a span of lifetimes. There is no reason to rush the process. While Punctuated equilibrium happens when a portion of the population becomes isolated, and pushed into a tougher terrain. The organisms whop undergo punctuated equilibrium are the peripheral population, who are put into an extreme situation, under a lot of pressure. Its either sink or swim, to evolve or to die out. They have to adapt or else they will not survive in this new environment. Then they may re introduce and compete with the original population. In gradualism, no isolation occurs, there is no peripheral population. The change merely happens because of chance, or simply because genetics become more complex and mutation may occur. There is no risky situation the organism is placed into, there is no stress which limits the beings options, besides the already valid predator stress and the present habitat stress. It happens because the course which offspring just have favorable traits and survive. That is the main differences between Gradualism and Punctuated Equilibrium.
Ways Gene Pools Can Change
The ways a gene pool can change is by 5 mechanisms of micro evolution.
1. Natural Selections: those best suited or fittest in an environment survive, mate and produce offspring. Which passes their genetics
2. Mutation: is a change in the DNA in an organism. The change can either be beneficial or harmful to the organism, and is passed down to future generations
3. Genetic Drift: the change in a gene pool by chance coincidence. ex. dinosaurs extinction
4. Gene Flow: The transfer of genes to one populations to another, the mixing of genetics to introduce a new variation into the population.
5. Non-Random Mating: Organisms not mating with random specimen, choosing their mate based on criteria. Ex choosing color, or having multiple mates.
1. Natural Selections: those best suited or fittest in an environment survive, mate and produce offspring. Which passes their genetics
2. Mutation: is a change in the DNA in an organism. The change can either be beneficial or harmful to the organism, and is passed down to future generations
3. Genetic Drift: the change in a gene pool by chance coincidence. ex. dinosaurs extinction
4. Gene Flow: The transfer of genes to one populations to another, the mixing of genetics to introduce a new variation into the population.
5. Non-Random Mating: Organisms not mating with random specimen, choosing their mate based on criteria. Ex choosing color, or having multiple mates.