SAQ : What is tactic movement? What are the different types of tactic movements? 

Question

What is tactic movement? What are the different types of tactic movements? 

Answer

Tactic movement is a type of movement in which an organism moves in response to a stimulus, such as light, gravity, chemicals, or touch. The direction of the movement is dependent on the direction of the stimulus.

There are many different types of tactic movements. Some common examples include:

1. Phototaxis: This is the movement of an organism towards or away from light. Positive phototaxis is the movement towards light, while negative phototaxis is the movement away from light.
2. Chemotaxis: This is the movement of an organism towards or away from a chemical stimulus. Positive chemotaxis is the movement towards a chemical, while negative chemotaxis is the movement away from a chemical.
3. Geotaxis: This is the movement of an organism towards or away from gravity. Positive geotaxis is the movement towards the ground, while negative geotaxis is the movement away from the ground.
4. Thigmotaxis: This is the movement of an organism towards or away from a solid surface. Positive thigmotaxis is the movement towards a surface, while negative thigmotaxis is the movement away from a surface.
5. Thermotaxis: This is the movement of an organism towards or away from heat. Positive thermotaxis is the movement towards heat, while negative thermotaxis is the movement away from heat.