Plants appear to bend towards light due to–
- AConcentration of auxins at shoot tip
- BConcentration of auxins at root tip
- CDiffusion of auxins towards the shady side of the shoot
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (c) Diffusion of auxins towards the shady side of the shoot
Explanation
The hormone auxin is made at the shoot tip. When light falls from one side, auxin moves to the shaded side, where it makes the cells grow longer.
The shaded side grows faster than the lit side, so the shoot bends towards the light (phototropism).