HORTICULTURE

Detailed explanation-1: -stimulus. Any change in the environment to which an organism responds to is called a stimulus. Response is the reaction of the organims to the stimulus. Tropism is the growth movement of the organism depending on the direction of the stimulus.

Detailed explanation-2: -A stimulus is a change in the external or internal environment that produces a physiological response. When applied to sensory receptors, it provokes behavior or response. Internal stimuli (such as changes in blood pressure) and external stimuli (tactile, sound, smell, taste, vision, etc.).

Detailed explanation-3: -All living things are able to respond to stimuli in the external environment. For example, living things respond to changes in light, heat, sound, and chemical and mechanical contact. To detect stimuli, organisms have means for receiving information, such as eyes, ears, and taste buds.