Imagine two heterozygous parents. each has a dominant allele x for brown eyes and a recessive allele x for blue eyes. the phenotypic ratio for brown: blue eyes in their children is

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

the answer you are looking for is the united states forest service.

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