Which statement about water transport in the xylem is true?

Question

Quizplus · Accepted Answer

Water in the xylem is under tension due to the transpiration pull, which is caused by evaporation of water from the leaves. This tension creates a negative pressure gradient that pulls water up from the roots to the upper parts of the plant. Option A is incorrect because water is not actively pumped up from the roots by the plant. Option B is incorrect because during drought conditions, plants may close their stomata to conserve water, but water transport does not completely stop. Option C is incorrect because water transport occurs in dead xylem cells. Option E is incorrect because water movement is directly related to transpiration.

Which Statement About Water Transport in the Xylem Is True