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Texto del Guión Gráfico
- (JR Pfeiffer P: 3) 1:Population
- 2: Genetic Variation
- 3: Overproduction of Offspring
- Sharks are very common in the ocean. Their different colors show natural variation. The ocean has a ton of predators such as killer whales. The ocean gets very dark at night.
- 4: Competition & Natural Selection
- Genetic variation gives all the sharks different characteristics. The main one is their color, some are very dark, some are light blue and others are white. Genetic variation is the genes creating different individuals in the same population.
- 5: Adaptation
- at the beginning of the winter season, more and more sharks are born in various amounts of colors. However it's alarming how many new sharks are born and this causes overpopulation. Shelter, safety and especially food will become scarce.
- Evolution Has Occured
- The darker sharks are harder for its predator, the killer whale, to hunt. The sharks with the lighter colors stand out in the dark sea and the killer whales make them an easy dinner . the darker shark's natural selection is the best suited for the darker environment and will survive and reproduce comfortably.
- Dark colored sharks were more likely to survive and create more offspring than any other. After various years of natural selection, this left most of the population of the new generation to be dark sharks. The offspring now carry the heritable trait of white fur ,making it easier to adapt and survive in their environment.
- Evolution can happen quickly or slowly in an environment depending on the size of change and genetics in population. The genetic differences can include a short/long tail, light/dark fur, short/long back legs, big/small ears etc. In this environment specifically, the dominant genetic trait is white fur. The environment of the snowy forest gives a sort of layout to whom can adapt , survive and create offspring.
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