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Unformatted text preview: The presence of sugar in a sieve tube attracts water. Water moves into the sieve tube from adjacent xylem cells increasing the pressure in the sieve tube Increased pressure forces the solutes into the next cell of the sieve tube. This mechanism is called pressure flow, a type of bulk flow. Active transport (cotransport with proton pumps) is again used at the sink, to move the solutes into the cells where they will be needed or stored....
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This note was uploaded on 01/08/2012 for the course BIO 213 taught by Professor Makina during the Fall '09 term at SUNY Stony Brook.
- Fall '09