Ecology - Theory of Evolution Crossword Puzzle

QUESTIONS LIST: divergent : _ evolution is when species that once were similar diverge, becoming increasingly distinct, stabilizing : _ selection favors average individuals in a population, evolution : "a change in the gene pool of a population over time" is a definition for _ , geographic : _ isolation occurs when a physical barrier divides a population, phenotype : the outward expression of genetic make-up, directional : _ selection occurs when natural selection favors one of the extreme variations of a trait, natural : _ selection - a mechanism for change in populations, homologous : structural features with a common evolutionary origin are _ , population : all the members of a species that live in an area, adaptation : any variation that aids an organism's chances of survival in its environment is _ , allele : alternative forms of a gene for a particular trait, short : physiological adaptations can occur over _ periods of time, gene pool : all of the alleles of the population's genes, mutation : one mechanism for genetic change is environmental, such as radiation, artificial: _ selection - darwin practiced this type of breeding with his pigeons, dna : nearly all organisms share _ indicating that biochemistry might support evolution, incomplete : the fossil record is _ and is an indirect evidence of evolution.