Survival of the Fittest

Survival of the Fittest
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Storyboard Description

natural selection

Storyboard Text

  • In this forest, near a volcano, there are two species of snakes that reside in this habitat. One species is a dark green, brownish color, whereas the other species is a red, black, and white.
  • The reason these snakes are different in their appearances is because the differences in their genotype leads to differences in their phenotype.  This difference in genotype is known as genetic variation. The traits that each type of snake inherits from their parents are different, this causes variation. 
  • Oh no! This is not good for all of the snakes in this habitat. These many snakes can't all feed off of one mouse. When there's too many organisms and not enough resources, in this case food, there is overproduction. Overproduction occurs when the mother lays tons of eggs or gives birth to many offspring. 
  • In this scene, the three snakes that are the dark greenish color have a higher chance of surviving and finding a mate. They are safe from the owl because they are able to camouflage. Camouflaging is a physical adaptation that allows animals to blend with their environment. This scenario is an example of differential survival and reproduction.
  • Changes in gene pool are caused by many factors, including gene mutations. In this case, a change, that was created over time, caused a type of species of snakes to change color. Some stayed the same, but most did not. This happened because during the process of creating genes for the offspring, a mutation occurred that changed the color of the following generation.
  • So, what is all of this called? This is called natural selection. Organisms use natural selection to survive. By definition, natural selection means: favors organisms that are better suited to survive in a given environment. In conclusion, this process gives us information on life as an animal/plant.
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