Geographic isolation - allopatric speciation
Storyboard Text
- Some wolves have an easier time surviving in the colder lake habitat than others and adapt to the environment more easily. Those wolves mate with others who also have an easier time surviving in the colder lake environment - passing on their favourable alleles.
- There is a population of wolves living in the mountains by a lake
- There is a flood that separates the wolves. Some stay up in the mountains while others stay in the lower parts by the water
- It is colder by the lake than in the mountains. Some wolves have thicker fur and longer tails than others that make them more suitable for their habitat by the lake
- Geographic Isolation is where 2 populations of the same species where are separated by a geographical barrier
- Variation is the differences in traits and physical features in a population
- If the two populations of wolves were to meet again, they would be completely different species as the wolves by the lake have thicker fur and longer tails whereas the wolves by the mountain have different traits that are suited for the mountain. The two species would not be able to reproduce to have living, fertile offspring
- Selection is where some organisms have traits that give higher chances of survival and reproduction
- The offspring of the wolves inherit traits from their parents such as thicker fur longer tails which help them in the colder lake habitat that they live in
- Inheritance the process where a 'fit' organism survives, reproduces and passes down traits which their offspring will inherit
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- Time is the important factor as over time certain traits that are helpful to an animal's habitat become more popular
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