Speciation
The answer is: gradualism
When light waves slow down as they travel from one medium to another, such as from air to glass, they do change direction. This change in direction is called refraction and occurs due to the change in speed of the light waves in the new medium.
The slow process that results in new species is called speciation. This occurs when a population of a species becomes isolated from the rest of its species and over time, genetic mutations and natural selection cause it to evolve into a distinct species. This process can take thousands or even millions of years to be completed.
It is actually another theory explaining how a new species arises. The theory itself states that a species goes a long time without change, then suddenly changes.
Since it is new, there are no files there that would make a PC perform slow. Every computer is supposed to perform fast. If not, return it and change to another computer.
Evolution
evolution
Evolution
Species can change is there is a mass extinction or if the type of species changed the type of climate or terrain which would would make the species evolve to its new environment so that it can survive.
Waves slow down when they move from one medium to another with a different wave speed. This can happen at boundaries between materials of different densities, such as air to water or water to glass. The change in speed is due to the change in the wave's frequency and wavelength as it enters the new medium.
extinct.
Adaptation is when a species is able to change over time to new changes in their environment.