Question

Give five comparison among taxis, nastism and tropism

Answer 1

The key difference between taxis and tropism is that the taxis refers to the directional movement of animals in response to a stimulus while tropism refers to the directional movement of plants in response to a stimulus.

• Taxis is a process that shows directional movement or orientation of animals in response to an external stimulus. The whole body shows movements towards or away from the stimulus. Unicellular organisms, mainly protozoans show distinct taxis responses to different stimuli.

• Tropism is the response of plants towards or away from a stimulus. The word ‘Tropism’ is mainly used to refer to how plants respond to external stimuli. Similar to taxis, tropism is also can be categorized based on the type of the stimulus and the direction of the response. Tropism is positive if it is towards the stimulus. If it is away from the stimulus, it is negative tropism. When the stimulus is sunlight, we call it as phototropism.