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.