Through fossil and genetic evidence. Genetic evidence can be used to construct trees of relatedness; fossil evidence can be used to give us an idea of what remote ancestors looked like and when they lived.
Evolution
Evolution is a change in species over time.
Evolution is the change in allele frequency over time in a population of organisms. Change over time.
A gradual change in life-forms over time is organic evolution.
Evolution.
You are an example of human micro-evolution as the population of humans has changed allele frequency over time. Micro-evolution is just evolution; change over time.
Changes over time that happen to suit the environment are evolution.
No - individuals do not evolve, as each individual's genes do not change, and evolution is defined as the change in allele frequencies over time.
Evolution, of course! Biological evolution.
evolution
evolution