Write three differences between tactic tropic and nastic movement.
|Direction of Response
|Tactic movements are directional, responding towards the stimulus.
|Tropic movements are directional, responding towards the stimulus.
|Nastic movements are non-directional, lacking a specific orientation.
|Sensory Perception Mechanism
|Tactic movements typically involve specific sensory organs or structures that perceive the stimulus directly.
|Tropic movements also involve specific sensory organs or structures that perceive the stimulus directly.
|Nastic movements often rely on general perception by the plant and do not necessarily involve specialized sensory organs.
|An example of tactic movement is geotropism, where plant roots grow towards gravity.
|An example of tropic movement is phototropism, where plant stems bend towards a light source.
|Examples of nastic movements include thigmonasty, such as the closing of Mimosa pudica leaves when touched, or nyctinasty, where some flowers open and close in response to the daily light-dark cycle.