Speciation Crossword puzzle

_____________ selection is toward one variant and against another.
__________ selection occurs when process select against the mean and for the extremes.
____________ selection is against both extremes and is for the average.
____________ isolation is when two or more species reproduces at different times.
____________ isolation is what two or more species can not mate because they have different types of behavior.
____________ isolation keeps 2 different species mating with each other.
_____________ isolation is when the same species can not bread because of a barrier.
____________ drift is a loss in genes in a small population.
___________ effect happens when there was a natural disaster and kills a large portion of the population.
_________ effect is when a few individuals from a population start a new population with a different allele frequency then the original population.