: 3. Transport through the Phloem Identify the statement that would describe the identified parts of the diagram. Write the number on the spaces before
: 3. Transport through the Phloem
Identify the statement that would describe the identified parts of the diagram. Write the number on
the spaces before each statement.
Movement of the phloem sap is
bidirectional (may be up and down)
depending to the location of sink cells.
pulls water up
Sucrose enters the phloem from the
source cells through the companion cells.
Internal pressure differences drive the
phloem sap along the sieve tube to sink
Water transfers to the xylem by
osmosis raising the pressure potential on
the sieve tube.
Sucrose is unloaded into sink cells
…and water moves back
into the xylem by osmosis.
increasing the water potential in the sieve
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