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?
Only the tip of the seedling received the light
The light was not strong enough
The seedlings were rather too young
The tip of the seedling may have been covered
The box containing the seedling should have been placed on a laboratory bench
Correct answer is A
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.