According to the pressure-flow hypothesis, what mechanism causes the movement of phloem sap from sources to sink tissues? See Se
ction 35.4 (Page) . A) Transpirational pull from the leaves
B) Solute potential differences between source and sink
C) Root pressure
D) Pressure potential differences between source and sink
D) Pressure potential differences between source and sink
Explanation:
high turgor pressure causes the movement of phloem sap from source to sink, Sap moves through phloem via translocation, the transport of dissolved materials in a plant. Unlike the xylem, which can only carry water upward, phloem carries sap upward and downward, from sugar sources to sugar sinks.
The general shape of the epithelial cells that are nearest
to the lumen during an empty urinary bladder of an individual is transitional
cuboidal epithelium, they are cuboidal in shape as they are relaxed and later
transition when stretched and filled with urine.
