Module 4 Chapter 31 Multiple choice questions 31.4

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. Refer to the following figure.



This figure shows the dispersal of fruits, containing seeds, from an area in which the parent plants were growing. Which type of dispersal is most likely to account for this?

Wind correct incorrect

Animal correct incorrect

Water correct incorrect

Explosive correct incorrect

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. The plant Himalayan balsam (Impatiens glandulifera) has explosive fruits that can disperse seeds well away from the plant. In controlled conditions, a student measured the dispersal distances of 10 seeds from one plant. The distances were (m): 7, 4, 6.5, 4.5, 5, 4, 6, 5.5, 3.5, and 4. Based on these values, which one of the following statements is correct?

The mean distance was 5.5 metres. correct incorrect

50% of measured distances were less than the mean distance. correct incorrect

45% of measured distances were more than the mean distance. correct incorrect

The range of distances (lowest to highest) was 4 metres. correct incorrect

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