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In a relatively small iguana population the allelic frequency is tracked for three generations. webbing is a recessive allele; no webbing is the dominant allele. during one very rainy spring and summer, a flood washes all the iguana without webbed feet out to sea. by the fall, and three generations later, you have the gene pool seen here.

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Restless tectonic plates move (shift) between one and fifteen centimeters per year month day minute