Question

A potted plant placed near the window bends outwardly due to

• A. Greater oxygen availability to the tip.
• B. More auxin content on the shaded side.
• C. Greater light availability to tip.
• D. Availability of necessary warmth to the tip.

Answer 1

The correct option is B More auxin content on the shaded side.

Greater growth on the shaded side of the stem is due to more accumulation of auxin on the shaded side than on the illuminates. Auxin causes bending of plant towards light. Phototropism is induced by auxin hormone.