What is the best definition of evolution?
In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. Evolution relies on there being genetic variation? in a population which affects the physical characteristics (phenotype) of an organism.
Whats the meaning of evolution?
1a : descent with modification from preexisting species : cumulative inherited change in a population of organisms through time leading to the appearance of new forms : the process by which new species or populations of living things develop from preexisting forms through successive generations Evolution is a process ...
What are causes of evolution?
There are five key mechanisms that cause a population, a group of interacting organisms of a single species, to exhibit a change in allele frequency from one generation to the next. These are evolution by: mutation, genetic drift, gene flow, non-random mating, and natural selection (previously discussed here).