Question 40
Plant Responses and HormonesThe tips of some rice seedlings were cut off while some were left intact. Both were covered with a container which had only one small hole to allow light through. After twenty-four hours it was observed that
- A.the cut tips bent away from light
- B.the cut tips bent towards source of light
- C.the intact tips bent away from the light
- D.the intact tips bent towards light
- E.both tips bent away from light.
Show the answer and explanation
Answer: D (the intact tips bent towards light)
Explanation
The tip detects light and produces the auxin that causes bending, so only intact seedlings bend towards the light.