If a stem is girdled,what happens?

  • A
    Root dies first
  • B
    Shoot dies first
  • C
    Both die together
  • D
    None of the above would die

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Intensity of light required for the translocation of sugar as compared to photosynthesis is:

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$(1)$ In Xylem : Vessel :: In Phloem : ..........
$(2)$ Synthesis of food : Source :: Regions of need : ...........

Who supported the cytoplasmic flow hypothesis for translocation of food in plants?

Chemical analysis of phloem sap shows the presence of:

According to the pressure flow hypothesis:
$A.$ Phloem loading produces a hypertonic condition in the sieve tubes.
$B.$ Water potential gradient facilitates the mass movement in the phloem.
$C.$ Phloem unloading is a passive process.

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