Question

If the seedlings are grown in darkness

• 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)

The seedlings grown in darkness are taller due to the activity of auxin because auxin contents in darkness are high than light.
A signal from the cell wall decides that, in the dark, seeds grow into long yellow sprouts, instead of turning green and forming leaves.