We'll start with the dog population. The fur color of this dog group varies. Some dogs are brown, while others are white.
A flood strikes, separating the dogs. On one side, there is a more wintery biome, while on the other, there is a more lush vegetation habitat.
White dogs flourish in the colder biomes because they can blend in and escape predators easier. As a result, the brown dogs gradually die off over many generations, while the white dogs grow increasingly prevalent. With the minimal amount of predation that happens, the dogs flourish more on this side.
The brown dogs, on the other hand, are prospering on the opposite side of the newly formed river, thanks to their brown fur, which helps them blend into their surroundings. With the strong predation on this side, the white dogs are struggling to live.
Over many generations and hundreds of years, the brown dogs and white dogs evolved into distinct species. Brown dogs have a slim frame with a large body, but white dogs have thicker hair to keep the cold at bay.
After a very long period, the two new species finally meet. Because of barriers known as mechanisms of reproductive isolation, they are unable to interbreed and generate healthy, viable progeny. So, at long last, we have two separate populations descended from a single one.
Loodud üle 30 miljoni süžeeskeemi
Proovimiseks Pole Vaja Allalaadimist, Krediitkaarti ega Sisselogimist!