Question

To which of the following directional stimulus roots of a plant do not respond?

• A. gravity
• B. candle light
• C. moisture
• D. touch

Answer 1

The correct option is D touch

• Roots do not respond to touch.
• The movement of plant roots towards the moisture(water) in the soil is called hydrotropism.
• The bending of roots away from the burning candle is an example of phototropism.
• The movement of a plant part in response to gravity is called geotropism.