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The figure below shows a stem of a plant growing round a tree trunk

      

The figure below shows a stem of a plant growing round a tree trunk
BIOLOGY3222019210.png
a) What is the name of the response which causes such a twisted growth?
b) Explain how twisting process is accomplished

  

Answers


sharon
a) Thigmotropism/haptotropism
b) The part of the stem in contact with the tree trunk has lower auxin content than the outer part;
High concentration of auxin on the outer part away from the plant promotes faster growth of this side causing the stem of the plant to grow or coil round the tree trunk.
sharon kalunda answered the question on March 22, 2019 at 11:13


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