Time represents the generations (or years, decades, and centuries) in the future, in which a population inherits successful adaptations.
Effect of Prey on White Owl Population
About 100 miles away, a few brown owls were able to reproduce in a different climate. In the forest, brown owls began to reproduce slowly, without heterozygous or white feather genes.
Effect of Prey on Brown Owl Population
Over the course of several generations, the original owl population dominated being white feathered, as it was a successful adaptation many generations ago in the snowy habitat.
Speciation is the process of developing a distinct species out of populations, commonly determined by their ability to make fertile offspring.
In the snowy climate, most rats hide underground, making the white owls give birth underground, rather in the trees. In short, the species of white owls have adapted to give birth underground, where it's more humid and there is a more accessible food source for the offspring.
Different species are organisms that cannot naturally reproduce on their own and make fertile babies.
In the forest climate, most rats hide in the trees, making brown owls live in the trees as well. The climate in the trees has great circulation, as opposed to underground.
After many generations, the snow storm died down, allowing the brown and white owls to reunite. However, white owls only felt safe giving birth underground with humidity, while the brown owls wanted to give birth in the trees with free air supply.
Unfortunately, a white owl cannot mate with a brown owl, as it leads to infertile offspring with genetic mutations that cannot survive in either climates. The only possible offspring genotype is heterozygous, which was not successful in either climates for the previous generations.