Question

Why do stems grow towards the source of light

Answer 1

The plant hormone auxin is responsible for a plant's ability to grow towards the light. The plant hormone auxin is responsible for a plant's ability to grow towards the light. ... As we know from looking at plants on a windowsill, they grow toward the sunlight to be able to generate energy by photosynthesis.May 28, 2013

Answer 2

Answer:

The stems grow towards the source of light due to the accumulation and diffusion of auxin on the shaded or lower side of the shoot apex. Hence more growth is observed on the shaded side and the steam grow upward.