Plants have evolved and acquired the ability to bend towards light. This ability is made possible by a hormone, auxin. Auxin elongates cells on the side of the plant away from the light, thus forcing it to bend towards the light source.
Two students investigated a plant’s ability to bend toward light under several experimental conditions, as shown in Table 1.
Figure 1 illustrates the design of each treatment.
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Comparison of Treatments I and II shows that:CorrectIncorrect
Comparing which two treatments indicates that the ability to grow towards the light is affected by removing the tip, not simply wounding/cutting it?CorrectIncorrect
The students concluded that auxin must be produced in the tip of the plant and not in the stem. A comparison of the results of which two treatments support this conclusion?CorrectIncorrect
Based on Table 1 and Figure 1, which trial was most likely the experimental control?CorrectIncorrect
Based on the passage and Treatments I and II, a comparison of the cells on the side away from the light would show that in Treatment II, these cells were:CorrectIncorrect