Which of the following would be an example of a negative phototaxis?Group of answer choicesA sunflower turning its face toward the sun.A snail retracting into its shell at midday.A moth flying towards a porch light at night.A desert tortoise moving towards a water hole on a hot day.
Question
Which of the following would be an example of a negative phototaxis?Group of answer choicesA sunflower turning its face toward the sun.A snail retracting into its shell at midday.A moth flying towards a porch light at night.A desert tortoise moving towards a water hole on a hot day.
Solution
The example of a negative phototaxis would be "A snail retracting into its shell at midday."
Phototaxis is an organism's automatic movement towards or away from light. When the movement is towards light, it's called positive phototaxis. When the movement is away from light, it's called negative phototaxis.
In this case, the snail is moving away from light (retracting into its shell at midday to avoid the bright sunlight), which is an example of negative phototaxis. The other examples provided are either neutral or examples of positive phototaxis.
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