It took 1649 <span>took </span><span>for the world population to double, going from .25 billion people to .50 billion people.</span> years.
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isolated I think I need more instructions
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<em>Mechanism, Evidence ... - Toppr</em>
<em>Mechanism, Evidence ... - TopprThe transportation occurs in the direction of the source to sink. Transport of organic solutes from one part of the plant to the other through phloem sieve .</em>