10. When you have waxed your car, rainfall makes very large droplets that roll a

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10. When you have waxed your car, rainfall makes very large droplets that roll around on the hood. This property of the water molecule is known as a) adhesion b) turgor pressure c) cohesion d) transpiration e) negative pressure potential 11. Most minerals move into the xylem of the root's vascular cylinder from the endoderm by a) diffusion b) osmosis c) movement against a concentration gradient d) movement down a concentration gradient 12. Which term describes forcing water out of the plant leaves? a) water stress b) atmospheric pressure c) root pressure d) transpiration 13. Which force is responsible for moving water up to the tops of plants? a) water stress b) atmospheric pressure c) root pressure d) transpiration e) c and d 14.Which force pushes water into the xylem at the root as osmosis moves water into the root? c)root pressure a) water stress b) atmospheric pressure d) transpiration 15. Which statement is Not true about the pressure-flow model of phloem transport? a) Water is actively transported into phloem. b) Pressure is created in the phloem by the buildup of water and solutes c) Sugar produced by photosynthesis is actively transported into the phloem cells. d) Sugar is actively transported out of the phloem at the sink area such as the root. 16. The loss of water by the leaves and stem of a plant is called a) translocation b) osmosis c) active transport d) transpiration 17. The driving force for transpiration is provided by a) water pressure in the roots b) water tension in the stems c) the evaporation of water from the leaves d) the hydrolysis of ATP 18. What causes water molecules to stick together and pull each other up a plant stem a) adhesion b) cohesion c) phloem d) companion cells 19. Which of the following statements is not true concerning the cohesion-tension theory of water movement in plants? a) Adhesion accounts for the attraction between water molecules. b) Cohesion accounts for the attraction between water and the vessel walls. c) Root pressure is a significant force in driving water up a stem. d) Companion cells help xylem regulate the passage of water and minerals. e) All of the above are not true. 20. The driving force for the movement of materials in the phloem of plants is a) gravity b) a difference in osmotic potentia(turgor) between the source and sink c) root pressure d) transpiration of water through the stomates Questions II:

Explanation / Answer

10. option c (cohesion)

11. option c (movemnt against concentration gradient) minerals are moving form low concentration to higher concentration.

12. option D ( transpiration ) it is the process of releasing the water form the plants to the atomosphere.

13. option d ( both c and d that is root pressure and the transpiration )

16. option D (Transpiratrion)

17. option c ( the evaporation of water from leaves )

18. option B ( cohesion )

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