Plant responses to stimuli vary in speed. The sensitive plant exhibits a quick response to touch, showcasing rapid movement.

Geotropism is the response to gravity, influencing the direction of plant growth. Roots exhibit positive geotropism, growing towards gravity, while shoots show negative geotropism, growing away from gravity or upwards.

Shoots exhibit positive phototropism by bending towards light, while roots display negative phototropism by bending away from light.

Chemotropism is the directional growth of plant parts in response to chemicals. An example is the growth of pollen tubes towards ovules during the reproductive processes of plants.

Hydrotropism is the directional growth of plant parts in response to water. An example is the roots of a plant growing towards a water source in the soil.