In a photo-tropic experiment, young seedlings in a box were subjected to light from one direction. The seedling continue to grow erect. Which of the following statement is correct
A. The light was not strong enough B. The tip of the seedling may have been covered C. Only the tip of the seedling received the light D. The seedlings were rather too young E. The box containing the seedling should have been placed on a laboratory bench
Correct Answer: C
Explanation
Plants growing with an unshaded light source will grow straight up towards the sun because auxin is evenly distributed all around the shoot. Plants are able to “see†light using the tips of the plant shoots.
