The major components of nearly every cell that play an important role in developing and repairing bone, muscle, skin, and blood cells are?

hi,

the answer is third world countries, take for instance china, they restricted each family with only one child,

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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