A) Movement of short towards the source of light
B) Nyctinasty
C) Movement of sunflower towards sun
D) All of the above
Correct Answer: A
Solution :
Auxin concentration increases in shaded area, i.e., auxins are collected in the opposite side of light. Increased auxin concentration is stimulatory for shoot growth and for this reason, shaded side shows more growth than the lighted side. Hence, bending of shoot takes place towards light.
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