AP BIOLOGY

Detailed explanation-1: -The movement or growth of any part of a plant in response to an external stimulus is called tropism or tropic movement.

Detailed explanation-2: -The ability of an organism to respond to external stimuli is called sensitivity. For example, Plants grow towards light(external stimuli) sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.

Detailed explanation-3: -Thigmotropism is plant growth response to touch. An example of this tropism is the curling of a vine tendril around objects that it touches.

Detailed explanation-4: -Tropism is when a plant moves in response to an external stimulus in the environment. Positive tropism is when a plant moves towards a stimulus. Negative tropism is when a plant moves away from a stimulus.