Question 36
Plant Responses and HormonesThe growth of a coleoptile towards unilateral light source is due to
- A.rapid rate of photosynthesis
- B.unequal distribution of auxin
- C.the effect of geotropism
- D.the effect of photolysis
Show the answer and explanation
Answer: B (unequal distribution of auxin)
Explanation
More auxin collects on the shaded side, so that side grows faster and the coleoptile bends towards the light.