Question Detail
Question
In 1880, Charles Darwin and his son Francis concluded that a growth stimulus for phototropism is produced in which part of the plant?
Correct Answer
Option B is the correct answer.
Detailed Explanation
The Darwins concluded that the reception of light at the tip of the coleoptile stimulated a growth stimulus that was then transmitted to the growth zone below.
Hint
This is the very top 'cap' of the grass seedling.