Multiple choice

The increased response of an organism with respect to the increase in light intensity is called

  1. kinesis

  2. positive phototaxis

  3. luminis

  4. negative phototaxis

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A Correct answer
Explanation

Kinesis is a non-directional change in activity rate in response to stimulus intensity - as light increases, the organism's movement increases without directional orientation. Phototaxis is directional movement toward (positive) or away (negative) from light, which is different from the described response.