Which of the following is NOT true about the cohesion-tension model of water transport?Select one:a. Water must completely fill
the pipeline.b. Water molecules attract one another.c. Transpiration exerts a tension as water evaporates from leaves.d. Water is transported in the phloem.e. Water must be attracted to the sides of the xylem.
Xylem is the vascular tissue responsible for the movement of water and dissolved minerals from roots to various plant parts. Phloem is another vascular tissue that serves mainly in the translocation of sugars. The cohesion-tension model of water transport explains that the upward movement of water from roots to the aerial plant parts is drive by transpiration pull. Transpiration of water from leaves results in a large negative pressure in xylem elements. Cohesion and adhesion properties of water maintain the water column in xylem elements.
When lactose is not present, what happens to E. coli is that the genes that produce the enzymes needed to break down lactose are not expressed. The correct answer is B.
