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The diagram shows a seedling, fixed to a rotating platform. Light is directed from one side only. The platform was allowed to rotate for two days. It was left stationary for a further two days. Which diagram shows the appearance of the seedling after this four-day period? A

77. The diagram shows a seedling, fixed to a rotating platform. Light is directed from one side only.\newlineThe platform was allowed to rotate for two days. It was left stationary for a further two days. Which diagram shows the appearance of the seedling after this four-day period?\newlineA

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Q. 77. The diagram shows a seedling, fixed to a rotating platform. Light is directed from one side only.\newlineThe platform was allowed to rotate for two days. It was left stationary for a further two days. Which diagram shows the appearance of the seedling after this four-day period?\newlineA
  1. Effect of Light: Understand the effect of light on the seedling.\newlineSince the light is coming from one side, the seedling will bend towards the light due to phototropism.
  2. Rotation Consideration: Consider the rotation of the platform.\newlineThe platform rotates for 22 days, which means the seedling is constantly changing its orientation relative to the light source. This rotation likely causes the seedling to grow more upright, as it doesn't consistently bend in one direction long enough to have a pronounced tilt.
  3. Stationary Platform Analysis: Analyze the effect of the platform being stationary. After rotating, the platform is left stationary for 22 days. During this time, the seedling will start bending towards the light from its last rotated position, as it is no longer moving to redistribute its orientation.
  4. Final Seedling Appearance: Predict the final appearance of the seedling. Combining the effects of rotation and stationary periods, the seedling will likely show a slight bend towards the light source but not as pronounced as if it had been stationary the whole time or if the light source had been moving around it.

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