Answer:
Evolution is is the change in the characteristics of a species over several generations and relies on the process of natural selection. it is reffered to as a theory because it is an incontrovertible fact that organisms have changed, or evolved, during the history of life on Earth.
Explanation:
U can look up the defeniton on google
Cold water currents tend to have a cooling affect on the continental coastlines that they border, while warm water currents tend to have a warming effect.
Sound waves reflecting off of objects
Chromosome
23
Also idk if the first one is right.
