3) Which of the following statements best explains the results associated with condition 5?

A) When a fan was added to heat and additional light, the rate of transpiration was slowed to the rate associated with room conditions, because the fan cooled the plants.
B) Additional heat and light and air movement caused the plants to lose so much water that after five minutes they wilted, thereby closing their stomata and preventing further water loss.
C) Additional heat resulted in such severe water loss that it could not be counteracted by air movement caused by the fan, and the plants died.
D) After five minutes the rate of transpiration gradually increased, because moisture was being brought up the stem more rapidly.

What is condition 5? Repost with adequate data for your question.

To determine the answer, let's break down the options and find the one that provides the best explanation for the results associated with condition 5.

Option A suggests that adding a fan to heat and additional light slowed down the rate of transpiration because the fan cooled the plants. This explanation seems to infer that the fan counteracts the effects of the heat and light, leading to a slower rate of transpiration.

Option B states that the additional heat, light, and air movement caused the plants to lose so much water that they wilted after five minutes, closing their stomata and preventing further water loss. This explanation implies that the excessive water loss due to the combined effects of heat, light, and air movement led to the plants wilting and stopping transpiration.

Option C indicates that the additional heat caused severe water loss that couldn't be countered by the fan's air movement, resulting in the plants' death. This explanation suggests that the negative effects of the heat on water loss outweighed the benefits of the fan's air movement, leading to the death of the plants.

Option D suggests that after five minutes, the rate of transpiration gradually increased because moisture was being brought up the stem more rapidly. This explanation implies that the increase in moisture absorption through the stem contributed to the increase in transpiration rate.

By analyzing the options, it becomes clear that option B provides the best explanation for the results associated with condition 5. It highlights that the combined effects of heat, light, and air movement led to excessive water loss, causing the plants to wilt and stop transpiration.