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In U.S.A, about 30-35....
Answer: Andrew Jackson was the seventh president of the United States. He served two terms in office from 1829 to 1837. During Jackson's presidency, the United States evolved from a republic—in which only landowners could vote—to a mass democracy, in which white men of all socioeconomic classes were enfranchised.
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Photosynthesis is important for all living organisms because it provides the oxygen needed by most living creatures for survival on the planet. Reasons Why Photosynthesis Is Important It is the number one source of oxygen in the atmosphere. It contributes to the carbon cycle between the earth, the oceans, plants and animals.
