Question

Which of the following is not a response to light?

• A. Closing of plant leaves due to a sudden flash of light.
• B. Gathering of insects around a glowing street lamp.
• C. Mimosa plant closing it's leaves when we touch it.
• D. A potted plant growing towards sunlight.

Answer 1

The correct option is C Mimosa plant closing it's leaves when we touch it.

$\bullet$ Leaves of mimosa plant folds up in response to touch and not light.
$\bullet$ The leaves reopen in few minutes, and it is thought that this adaptation is a defense against grazing herbivores who may be startled by the movement.
$\bullet$ It is also commonly known as the touch-me-not plant.