Tactic movements are ..............

Phototropic and seismonastic

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Phototactic, thermotactic and chemotactic

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Geotactic and thigmotactic

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None of the above

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Solution

The correct option is B Phototactic, thermotactic and chemotactic
The free type of movements induced by some external stimuli like light, temperature, chemicals, etc are called as tactic movements. They are of three types: Phototactic, chemotactic and thermotactic.

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Phototropic movement of shoot and geotropic movement of root are called growth movements in plants.

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