For water transport to occur there must be
A) palisade and spongy mesophyll.
B) sugar in the phloem.
C) atmospheric pressure available to do the work.
D) low pressure in the roots and high pressure in the leaves.
E) a continuous column of water in xylem and transpiration of water at the leaves.

Question

Quizplus · Accepted Answer

Water transport in plants occurs through the xylem vessels and involves a continuous column of water that is pulled up from the roots to the leaves due to transpiration (evaporation of water from the leaves) and the resulting tension in the xylem vessels. This process is also known as the cohesion-tension theory. Palisade and spongy mesophyll are not directly involved in water transport, while sugar in the phloem is involved in the transport of organic nutrients. Atmospheric pressure can contribute to water movement, but it is not essential for water transport to occur. Low pressure in the roots and high pressure in the leaves are not accurate descriptions of the water transport process.

For Water Transport to Occur There Must Be