Population, adaption, beak shape, species, food, natural selection, variation and trait. Words blank are the one listed is a process by which organization best fit for the environment are most likely to survive and reproduce. This is possible because of the genetic between individuals in a population. after many generation the that enhance survival become more widespread through the population over these that do not. Once all the members of a have this favorable traits then it would s referred to as an .This selection has occurred with nearly every on Earth. The Galapagos medium ground finch for example had developed a that is different from other finches on the Island. This adaption occurred due to different source. Word blank are listed on top mmm