Question

If the seedlings are grown in darkness then

• A. They are of the same size as those grown in light.
• B. They are much healthier than those grown in light.
• C. They are similar to those grown in light.
• D. They are taller than those grown in light.

Answer 1

Answer: (D)

They are taller than those grown in light.

The seedlings which are grown in darkness are taller compared to the seedlings which are grown in the light. The reason is the production of the photosensitive phytohormone auxin which causes an increase in the height of the plants. This hormone is destroyed in the presence of light and so the plants which are grown in light are comparatively shorter.

Thus, the correct answer is option D.